row_id string | source_dataset string | source_id string | pmid string | question string | context string | difficulty string | answer string | row_type string | edit_original_span string | edit_replaced_with string | edit_why_unsupported string | hallucination_category string | answer_containment float64 | twin_length_delta int64 | generation_attempts int64 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
UTAustin-AIHealth/MedHallu/pqa_artificial::3085::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 3085 | 26553192 | Does med14 cooperate with brg1 in the differentiation of skeletogenic neural crest? | BACKGROUND: An intricate gene regulatory network drives neural crest migration and differentiation. How epigenetic regulators contribute to this process is just starting to be understood.
RESULTS: We found that mutation of med14 or brg1 in zebrafish embryos resulted in a cluster of neural crest cell-related defects. I... | hard | Yes, research using zebrafish models indicates that the Mediator complex component med14 and the BAF complex subunit brg1 exhibit a significant genetic interaction. While these cells successfully migrate and reach their designated locations, both proteins are essential for the final maturation stage of the neural crest... | not_hallucinated | final maturation stage | initial migration stage | The abstract explicitly states that neural crest cells migrated to target sites normally in these mutants and that the defects occur during terminal differentiation, not during migration. | Misinterpretation of Question | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::3085::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 3085 | 26553192 | Does med14 cooperate with brg1 in the differentiation of skeletogenic neural crest? | BACKGROUND: An intricate gene regulatory network drives neural crest migration and differentiation. How epigenetic regulators contribute to this process is just starting to be understood.
RESULTS: We found that mutation of med14 or brg1 in zebrafish embryos resulted in a cluster of neural crest cell-related defects. I... | hard | Yes, research using zebrafish models indicates that the Mediator complex component med14 and the BAF complex subunit brg1 exhibit a significant genetic interaction. While these cells successfully migrate and reach their designated locations, both proteins are essential for the initial migration stage of the neural cres... | hallucinated | final maturation stage | initial migration stage | The abstract explicitly states that neural crest cells migrated to target sites normally in these mutants and that the defects occur during terminal differentiation, not during migration. | Misinterpretation of Question | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::3556::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 3556 | 18571585 | Does mononuclear cell-derived interleukin-1 beta confer chemoresistance in pancreatic cancer cells by upregulation of cyclooxygenase-2? | BACKGROUND: Pancreatic cancer is a very aggressive malignancy and efficient therapeutic options are still largely lacking. The importance of interactions between tumor cells and surrounding stromal elements, eg, mononuclear cells, for chemoresistance have been increasingly recognized. In addition, cyclooxygenase-2 is t... | hard | Yes, secretions from mononuclear cells induce chemoresistance in pancreatic tumor cells. This effect occurs because interleukin-1 beta promotes higher levels of cyclooxygenase-2 through the activation of the ERK1/2 signaling cascade, which ultimately leads to increased prostaglandin production and survival against chem... | not_hallucinated | ERK1/2 | PI3K/Akt | The abstract explicitly states that the activation of cyclooxygenase-2 expression by interleukin-1 beta is mediated by the ERK1/2 pathway, not the PI3K/Akt pathway. | Mechanism and Pathway Misattribution | 0.0244 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::3556::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 3556 | 18571585 | Does mononuclear cell-derived interleukin-1 beta confer chemoresistance in pancreatic cancer cells by upregulation of cyclooxygenase-2? | BACKGROUND: Pancreatic cancer is a very aggressive malignancy and efficient therapeutic options are still largely lacking. The importance of interactions between tumor cells and surrounding stromal elements, eg, mononuclear cells, for chemoresistance have been increasingly recognized. In addition, cyclooxygenase-2 is t... | hard | Yes, secretions from mononuclear cells induce chemoresistance in pancreatic tumor cells. This effect occurs because interleukin-1 beta promotes higher levels of cyclooxygenase-2 through the activation of the PI3K/Akt signaling cascade, which ultimately leads to increased prostaglandin production and survival against ch... | hallucinated | ERK1/2 | PI3K/Akt | The abstract explicitly states that the activation of cyclooxygenase-2 expression by interleukin-1 beta is mediated by the ERK1/2 pathway, not the PI3K/Akt pathway. | Mechanism and Pathway Misattribution | 0.0244 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::3919::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 3919 | 18563480 | Is the number of metastatic lymph nodes a significant risk factor for bone metastasis and poor outcome after surgery for linitis plastica-type gastric carcinoma? | BACKGROUND: Linitis plastica-type gastric carcinoma remains a disease with poor prognosis despite an aggressive surgical approach. Although a prominent pattern of disease failure is peritoneal carcinomatosis, some patients experience rapid disease progression without signs of the peritoneal disease.
METHODS: Clinicopa... | hard | Yes, increased lymph node metastasis is closely linked to higher risks of developing skeletal spread and experiencing inferior survival. Patients with more than sixteen positive nodes exhibit a notably higher frequency of bone recurrence and significantly worse overall clinical outcomes following surgical intervention ... | not_hallucinated | surgical intervention | hormonal regulation | The study attributes the poor outcomes and metastatic patterns to surgical outcomes and lymph node status, whereas the hallucination incorrectly suggests the mechanism of treatment and outcome influence is related to hormonal regulation, a pathway not discussed or relevant to this gastric carcinoma treatment. | Mechanism and Pathway Misattribution | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::3919::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 3919 | 18563480 | Is the number of metastatic lymph nodes a significant risk factor for bone metastasis and poor outcome after surgery for linitis plastica-type gastric carcinoma? | BACKGROUND: Linitis plastica-type gastric carcinoma remains a disease with poor prognosis despite an aggressive surgical approach. Although a prominent pattern of disease failure is peritoneal carcinomatosis, some patients experience rapid disease progression without signs of the peritoneal disease.
METHODS: Clinicopa... | hard | Yes, increased lymph node metastasis is closely linked to higher risks of developing skeletal spread and experiencing inferior survival. Patients with more than sixteen positive nodes exhibit a notably higher frequency of bone recurrence and significantly worse overall clinical outcomes following hormonal regulation fo... | hallucinated | surgical intervention | hormonal regulation | The study attributes the poor outcomes and metastatic patterns to surgical outcomes and lymph node status, whereas the hallucination incorrectly suggests the mechanism of treatment and outcome influence is related to hormonal regulation, a pathway not discussed or relevant to this gastric carcinoma treatment. | Mechanism and Pathway Misattribution | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::1474::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 1474 | 25091061 | Is delayed paracentesis associated with increased in-hospital mortality in patients with spontaneous bacterial peritonitis? | OBJECTIVES: Spontaneous bacterial peritonitis (SBP) is associated with high mortality. Early paracentesis (EP) is essential for rapid diagnosis and optimal treatment. The aim of the study is to compare the outcomes of patients with SBP who received EP vs. delayed paracentesis (DP).
METHODS: Consecutive patients who we... | medium | Yes, performing paracentesis after a twelve-hour delay is significantly linked to higher rates of death while in the hospital for these patients. Statistical modeling indicates that this timing increases the likelihood of mortality by nearly three times when accounting for established risk factors like renal impairment... | not_hallucinated | a twelve-hour delay | a significant delay | The abstract specifically defines the delayed group as 12-72 hours, not just a vague 'significant delay', which obscures the precise study findings. | Incomplete Information | 0 | -1 | 2 |
UTAustin-AIHealth/MedHallu/pqa_artificial::1474::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 1474 | 25091061 | Is delayed paracentesis associated with increased in-hospital mortality in patients with spontaneous bacterial peritonitis? | OBJECTIVES: Spontaneous bacterial peritonitis (SBP) is associated with high mortality. Early paracentesis (EP) is essential for rapid diagnosis and optimal treatment. The aim of the study is to compare the outcomes of patients with SBP who received EP vs. delayed paracentesis (DP).
METHODS: Consecutive patients who we... | medium | Yes, performing paracentesis after a significant delay is significantly linked to higher rates of death while in the hospital for these patients. Statistical modeling indicates that this timing increases the likelihood of mortality by nearly three times when accounting for established risk factors like renal impairment... | hallucinated | a twelve-hour delay | a significant delay | The abstract specifically defines the delayed group as 12-72 hours, not just a vague 'significant delay', which obscures the precise study findings. | Incomplete Information | 0 | -1 | 2 |
UTAustin-AIHealth/MedHallu/pqa_artificial::2879::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 2879 | 19561521 | Does resistance exercise training improve heart function and physical fitness in stable patients with heart failure? | PURPOSE: This study determined the effect of a structured isotonic strength training (ST) program on left ventricular (LV) function (ejection fraction, stroke volume, and end-diastolic and end-systolic volumes) and physical fitness (6-minute walk test, upper body strength, lower body strength, and body composition) in ... | easy | Patients with chronic heart failure who engage in a dedicated eight-week isotonic strength training regimen demonstrate meaningful enhancements in cardiovascular performance. Specifically, these individuals exhibit measurable increases in their resting ejection fraction and stroke volume alongside notable gains in phys... | not_hallucinated | stroke volume | heart pumping ability | The original span provided a specific measurement of heart function (stroke volume) mentioned in the results, whereas the replacement uses a vague, non-specific term that fails to capture the precise physiological finding supported by the abstract. | Incomplete Information | 0 | 1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::2879::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 2879 | 19561521 | Does resistance exercise training improve heart function and physical fitness in stable patients with heart failure? | PURPOSE: This study determined the effect of a structured isotonic strength training (ST) program on left ventricular (LV) function (ejection fraction, stroke volume, and end-diastolic and end-systolic volumes) and physical fitness (6-minute walk test, upper body strength, lower body strength, and body composition) in ... | easy | Patients with chronic heart failure who engage in a dedicated eight-week isotonic strength training regimen demonstrate meaningful enhancements in cardiovascular performance. Specifically, these individuals exhibit measurable increases in their resting ejection fraction and heart pumping ability alongside notable gains... | hallucinated | stroke volume | heart pumping ability | The original span provided a specific measurement of heart function (stroke volume) mentioned in the results, whereas the replacement uses a vague, non-specific term that fails to capture the precise physiological finding supported by the abstract. | Incomplete Information | 0 | 1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::4943::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 4943 | 26878873 | Does miR-193b promote autophagy and non-apoptotic cell death in oesophageal cancer cells? | BACKGROUND: Successful treatment of oesophageal cancer is hampered by recurrent drug resistant disease. We have previously demonstrated the importance of apoptosis and autophagy for the recovery of oesophageal cancer cells following drug treatment. When apoptosis (with autophagy) is induced, these cells are chemosensit... | hard | Research indicates that miR-193b expression encourages autophagic flux alongside non-apoptotic death mechanisms in these cancer cells. By bolstering these pathways, the molecule effectively suppresses the capacity of KYSE450 cells to rebound after exposure to 5-fluorouracil chemotherapy, demonstrating a clear role in m... | not_hallucinated | traditional apoptotic pathways | programmed apoptotic pathways | While the abstract states apoptosis is not involved, the edit changes the descriptive context of the conclusion regarding apoptosis in a way that implies a fabrication of the specific mechanism type being excluded by the study's findings. | Methodological and Evidence Fabrication | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::4943::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 4943 | 26878873 | Does miR-193b promote autophagy and non-apoptotic cell death in oesophageal cancer cells? | BACKGROUND: Successful treatment of oesophageal cancer is hampered by recurrent drug resistant disease. We have previously demonstrated the importance of apoptosis and autophagy for the recovery of oesophageal cancer cells following drug treatment. When apoptosis (with autophagy) is induced, these cells are chemosensit... | hard | Research indicates that miR-193b expression encourages autophagic flux alongside non-apoptotic death mechanisms in these cancer cells. By bolstering these pathways, the molecule effectively suppresses the capacity of KYSE450 cells to rebound after exposure to 5-fluorouracil chemotherapy, demonstrating a clear role in m... | hallucinated | traditional apoptotic pathways | programmed apoptotic pathways | While the abstract states apoptosis is not involved, the edit changes the descriptive context of the conclusion regarding apoptosis in a way that implies a fabrication of the specific mechanism type being excluded by the study's findings. | Methodological and Evidence Fabrication | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::824::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 824 | 27501523 | Is cytoplasmic expression of β-catenin an independent predictor of progression of conventional renal cell carcinoma : a simple immunostaining score? | AIMS: The aims of this study were to investigate the potential of β-catenin as a biomarker for predicting cancer-specific survival, and to find a reproducible mode of evaluation of immunohistochemistry.
METHODS AND RESULTS: β-Catenin expression was analysed by immunohistochemistry in a cohort of 488 patients with conv... | easy | Research demonstrates that cytoplasmic levels of beta-catenin serve as an independent prognostic marker for patients diagnosed with conventional renal cell carcinoma. Those exhibiting this specific protein accumulation face a significantly higher likelihood of cancer-related mortality. Consequently, this biomarker prov... | not_hallucinated | affected patients | clinical trials | The abstract discusses using the biomarker to guide surveillance or therapy for patients, not to recruit or monitor participants for clinical trials. | Methodological and Evidence Fabrication | 0.0161 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::824::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 824 | 27501523 | Is cytoplasmic expression of β-catenin an independent predictor of progression of conventional renal cell carcinoma : a simple immunostaining score? | AIMS: The aims of this study were to investigate the potential of β-catenin as a biomarker for predicting cancer-specific survival, and to find a reproducible mode of evaluation of immunohistochemistry.
METHODS AND RESULTS: β-Catenin expression was analysed by immunohistochemistry in a cohort of 488 patients with conv... | easy | Research demonstrates that cytoplasmic levels of beta-catenin serve as an independent prognostic marker for patients diagnosed with conventional renal cell carcinoma. Those exhibiting this specific protein accumulation face a significantly higher likelihood of cancer-related mortality. Consequently, this biomarker prov... | hallucinated | affected patients | clinical trials | The abstract discusses using the biomarker to guide surveillance or therapy for patients, not to recruit or monitor participants for clinical trials. | Methodological and Evidence Fabrication | 0.0161 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::3135::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 3135 | 26552601 | Are we also interested in how fathers feel : a qualitative exploration of child health center nurses ' recognition of postnatal depression in fathers? | BACKGROUND: To become a parent is an emotionally life-changing experience. Paternal depression during the postnatal period has been associated with emotional and behavioral problems in children. The condition has predominantly been related to mothers, and the recognition of paternal postnatal depression (PND) has been ... | easy | Nurses working in pediatric care settings often find identifying paternal postnatal depression challenging due to the ambiguous nature of symptoms. Their ability to screen for these emotional difficulties is further constrained by the absence of standardized protocols and prevailing societal gender norms that impede th... | not_hallucinated | societal gender norms | biological hormone levels | The abstract explicitly attributes the difficulty in recognizing PND to gender attitudes and lack of routines, not biological factors or hormone levels. | Mechanism and Pathway Misattribution | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::3135::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 3135 | 26552601 | Are we also interested in how fathers feel : a qualitative exploration of child health center nurses ' recognition of postnatal depression in fathers? | BACKGROUND: To become a parent is an emotionally life-changing experience. Paternal depression during the postnatal period has been associated with emotional and behavioral problems in children. The condition has predominantly been related to mothers, and the recognition of paternal postnatal depression (PND) has been ... | easy | Nurses working in pediatric care settings often find identifying paternal postnatal depression challenging due to the ambiguous nature of symptoms. Their ability to screen for these emotional difficulties is further constrained by the absence of standardized protocols and prevailing biological hormone levels that imped... | hallucinated | societal gender norms | biological hormone levels | The abstract explicitly attributes the difficulty in recognizing PND to gender attitudes and lack of routines, not biological factors or hormone levels. | Mechanism and Pathway Misattribution | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::4479::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 4479 | 16380310 | Does spirituality predict outcome independently of expectancy following flower essence self-treatment? | OBJECTIVE: The aim of this study was to determine whether absorption and spirituality predict the placebo response independently of expectancy.
METHOD: This was an open study of self-treatment with self-selected Bach flower essences. Participants' expectancy of the effect of flower essences, attitudes to complementary... | hard | Yes, spiritual inclination is a significant predictor of therapeutic results in this context. It accounts for a unique portion of the variance in reported symptom improvement that remains after accounting for the influence of participant expectations and associated holistic health views. | not_hallucinated | participant expectations | peripheral nerve endings | The study concludes that spirituality predicts outcome independently of expectancy (a psychological measure), not physiological structures like peripheral nerve endings. | Mechanism and Pathway Misattribution | 0 | 1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::4479::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 4479 | 16380310 | Does spirituality predict outcome independently of expectancy following flower essence self-treatment? | OBJECTIVE: The aim of this study was to determine whether absorption and spirituality predict the placebo response independently of expectancy.
METHOD: This was an open study of self-treatment with self-selected Bach flower essences. Participants' expectancy of the effect of flower essences, attitudes to complementary... | hard | Yes, spiritual inclination is a significant predictor of therapeutic results in this context. It accounts for a unique portion of the variance in reported symptom improvement that remains after accounting for the influence of peripheral nerve endings and associated holistic health views. | hallucinated | participant expectations | peripheral nerve endings | The study concludes that spirituality predicts outcome independently of expectancy (a psychological measure), not physiological structures like peripheral nerve endings. | Mechanism and Pathway Misattribution | 0 | 1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::5562::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 5562 | 16552399 | Do consistent relationships between sensory properties of savory snack foods and calories influence food intake in rats? | OBJECTIVE: Determine the influence of experience with consistent or inconsistent relationships between the sensory properties of snack foods and their caloric consequences on the control of food intake or body weight in rats.
DESIGN: Rats received plain and BBQ flavored potato chips as a dietary supplement, along with... | medium | In juvenile rats, frequent exposure to snacks where the taste reliably signals high caloric content leads to a decrease in basal chow consumption. This adjustment occurs regardless of whether the animals subsequently ingest a novel high-fat treat. Ultimately, these predictable caloric contingencies do not significantly... | not_hallucinated | do not significantly modify | do significantly modify | The abstract explicitly states that long-term experience with these contingencies did not affect body weight gain or body composition in juveniles. | Misinterpretation of Question | 0 | -1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::5562::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 5562 | 16552399 | Do consistent relationships between sensory properties of savory snack foods and calories influence food intake in rats? | OBJECTIVE: Determine the influence of experience with consistent or inconsistent relationships between the sensory properties of snack foods and their caloric consequences on the control of food intake or body weight in rats.
DESIGN: Rats received plain and BBQ flavored potato chips as a dietary supplement, along with... | medium | In juvenile rats, frequent exposure to snacks where the taste reliably signals high caloric content leads to a decrease in basal chow consumption. This adjustment occurs regardless of whether the animals subsequently ingest a novel high-fat treat. Ultimately, these predictable caloric contingencies do significantly mod... | hallucinated | do not significantly modify | do significantly modify | The abstract explicitly states that long-term experience with these contingencies did not affect body weight gain or body composition in juveniles. | Misinterpretation of Question | 0 | -1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::1055::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 1055 | 27513404 | Does rectal or intramuscular diclofenac reduce the incidence of pancreatitis afterendoscopic retrograde cholangiopancreatography? | BACKGROUND/AIM: Acute pancreatitis is the most common adverse event of endoscopic retrograde cholangiopancreatography (ERCP). We aimed to evaluate the efficacy of intramuscular diclofenac sodium for prophylaxis of post-ERCP pancreatitis (PEP) in comparison to the rectal form.
MATERIALS AND METHODS: One hundred and fif... | hard | Both intramuscular and rectal administration of diclofenac are effective strategies for preventing pancreatitis following this endoscopic procedure. Compared to the control group, patients receiving either form of the medication exhibit significantly lower rates of post-procedural pancreatic inflammation, demonstrating... | not_hallucinated | pharmacological | osmotic | The abstract discusses the use of a drug (diclofenac) for prophylaxis, which acts via a pharmacological pathway. Characterizing this as an 'osmotic' approach attributes the prevention to a mechanism of water movement or pressure gradients, which is entirely unrelated to the study findings and the drug's actual mode of ... | Mechanism and Pathway Misattribution | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::1055::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 1055 | 27513404 | Does rectal or intramuscular diclofenac reduce the incidence of pancreatitis afterendoscopic retrograde cholangiopancreatography? | BACKGROUND/AIM: Acute pancreatitis is the most common adverse event of endoscopic retrograde cholangiopancreatography (ERCP). We aimed to evaluate the efficacy of intramuscular diclofenac sodium for prophylaxis of post-ERCP pancreatitis (PEP) in comparison to the rectal form.
MATERIALS AND METHODS: One hundred and fif... | hard | Both intramuscular and rectal administration of diclofenac are effective strategies for preventing pancreatitis following this endoscopic procedure. Compared to the control group, patients receiving either form of the medication exhibit significantly lower rates of post-procedural pancreatic inflammation, demonstrating... | hallucinated | pharmacological | osmotic | The abstract discusses the use of a drug (diclofenac) for prophylaxis, which acts via a pharmacological pathway. Characterizing this as an 'osmotic' approach attributes the prevention to a mechanism of water movement or pressure gradients, which is entirely unrelated to the study findings and the drug's actual mode of ... | Mechanism and Pathway Misattribution | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::6586::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 6586 | 17287912 | Does postural instability necessarily correlate to poor performance : case in point? | BACKGROUND: It is very important for surgeons who perform minimally invasive surgery (MIS) to maintain proper postural stability, which kinematic research can determine. Previous studies in surgical ergonomics have shown that postural stability is correlated to instrument type, task difficulty, and skill level. What sh... | medium | No, postural instability does not inherently signal inadequate surgical output. Instead, observed adjustments in joint positioning or bodily posture often serve as deliberate tactical maneuvers designed to facilitate the procedure. These movements, while increasing total body motion, reflect a surgeon's compensation ra... | not_hallucinated | No, postural instability does not inherently signal | Yes, postural instability inherently signals | The abstract explicitly concludes that postural instability does not necessarily correlate to poor performance, whereas the hallucination claims the exact opposite. | Misinterpretation of Question | 0 | -2 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::6586::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 6586 | 17287912 | Does postural instability necessarily correlate to poor performance : case in point? | BACKGROUND: It is very important for surgeons who perform minimally invasive surgery (MIS) to maintain proper postural stability, which kinematic research can determine. Previous studies in surgical ergonomics have shown that postural stability is correlated to instrument type, task difficulty, and skill level. What sh... | medium | Yes, postural instability inherently signals inadequate surgical output. Instead, observed adjustments in joint positioning or bodily posture often serve as deliberate tactical maneuvers designed to facilitate the procedure. These movements, while increasing total body motion, reflect a surgeon's compensation rather th... | hallucinated | No, postural instability does not inherently signal | Yes, postural instability inherently signals | The abstract explicitly concludes that postural instability does not necessarily correlate to poor performance, whereas the hallucination claims the exact opposite. | Misinterpretation of Question | 0 | -2 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::8463::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 8463 | 8624148 | Does topical tretinoin ( retinoic acid ) improve early stretch marks? | BACKGROUND AND DESIGN: Stretch marks are disfiguring lesions usually caused by excessive stretching of skin. We investigated the response of early, clinically active stretch marks to topical 0.1% tretinoin (retinoic acid) cream. In a double-blind, randomized, vehicle-controlled study, 22 patients applied either 0.1% tr... | medium | Yes, using tretinoin cream daily is effective for treating early-stage stretch marks. Patients applying this medication for half a year experienced a visible reduction in the size and severity of their lesions, with the vast majority showing distinct clinical improvement compared to those using a non-active control sub... | not_hallucinated | clinical improvement | histological improvement | The abstract explicitly states that there were no significant differences in the quality or quantity of dermal collagen and elastic fibers, meaning histological changes were not observed. | Misinterpretation of Question | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::8463::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 8463 | 8624148 | Does topical tretinoin ( retinoic acid ) improve early stretch marks? | BACKGROUND AND DESIGN: Stretch marks are disfiguring lesions usually caused by excessive stretching of skin. We investigated the response of early, clinically active stretch marks to topical 0.1% tretinoin (retinoic acid) cream. In a double-blind, randomized, vehicle-controlled study, 22 patients applied either 0.1% tr... | medium | Yes, using tretinoin cream daily is effective for treating early-stage stretch marks. Patients applying this medication for half a year experienced a visible reduction in the size and severity of their lesions, with the vast majority showing distinct histological improvement compared to those using a non-active control... | hallucinated | clinical improvement | histological improvement | The abstract explicitly states that there were no significant differences in the quality or quantity of dermal collagen and elastic fibers, meaning histological changes were not observed. | Misinterpretation of Question | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::2432::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 2432 | 24755675 | Does the secretome of endothelial progenitor cells promote brain endothelial cell activity through PI3-kinase and MAP-kinase? | BACKGROUND: Angiogenesis and vascular remodelling are crucial events in tissue repair mechanisms promoted by cell transplantation. Current evidence underscores the importance of the soluble factors secreted by stem cells in tissue regeneration. In the present study we investigated the effects of paracrine factors deriv... | easy | Yes, the soluble factors released by endothelial progenitor cells enhance the growth, migration, and network organization of brain endothelial cells. This pro-angiogenic stimulation relies on the activation of intracellular signaling cascades, specifically the PI3K/AKT and MEK/ERK pathways, as blocking either of these ... | not_hallucinated | PI3K/AKT | JAK/STAT | The study specifically identifies PI3K/AKT and MEK/ERK as the relevant pathways, while JAK/STAT was never investigated or mentioned. | Methodological and Evidence Fabrication | 0.0625 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::2432::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 2432 | 24755675 | Does the secretome of endothelial progenitor cells promote brain endothelial cell activity through PI3-kinase and MAP-kinase? | BACKGROUND: Angiogenesis and vascular remodelling are crucial events in tissue repair mechanisms promoted by cell transplantation. Current evidence underscores the importance of the soluble factors secreted by stem cells in tissue regeneration. In the present study we investigated the effects of paracrine factors deriv... | easy | Yes, the soluble factors released by endothelial progenitor cells enhance the growth, migration, and network organization of brain endothelial cells. This pro-angiogenic stimulation relies on the activation of intracellular signaling cascades, specifically the JAK/STAT and MEK/ERK pathways, as blocking either of these ... | hallucinated | PI3K/AKT | JAK/STAT | The study specifically identifies PI3K/AKT and MEK/ERK as the relevant pathways, while JAK/STAT was never investigated or mentioned. | Methodological and Evidence Fabrication | 0.0625 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_labeled::326::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_labeled | 326 | 26879871 | Does depression diagnosis and antidepressant prescribing vary by location? | BACKGROUND: Studies have linked ethnic differences in depression rates with neighbourhood ethnic density although results have not been conclusive. We looked at this using a novel approach analysing whole population data covering just over one million GP patients in four London boroughs.
METHOD: Using a dataset of GP ... | medium | Research indicates that depression diagnosis and antidepressant prescriptions are significantly influenced by the local concentration of one's own ethnic group. For most studied minority populations, residing in areas with higher ethnic density correlates with a decreased likelihood of receiving a clinical diagnosis or... | not_hallucinated | ethnic density | genetic sensitivity | The abstract explicitly attributes the findings to neighbourhood ethnic density, whereas the hallucination attributes the effect to genetic sensitivity, which is a biological/physiological mechanism not discussed in the paper. | Mechanism and Pathway Misattribution | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_labeled::326::hallucinated | UTAustin-AIHealth/MedHallu/pqa_labeled | 326 | 26879871 | Does depression diagnosis and antidepressant prescribing vary by location? | BACKGROUND: Studies have linked ethnic differences in depression rates with neighbourhood ethnic density although results have not been conclusive. We looked at this using a novel approach analysing whole population data covering just over one million GP patients in four London boroughs.
METHOD: Using a dataset of GP ... | medium | Research indicates that depression diagnosis and antidepressant prescriptions are significantly influenced by the local concentration of one's own ethnic group. For most studied minority populations, residing in areas with higher genetic sensitivity correlates with a decreased likelihood of receiving a clinical diagnos... | hallucinated | ethnic density | genetic sensitivity | The abstract explicitly attributes the findings to neighbourhood ethnic density, whereas the hallucination attributes the effect to genetic sensitivity, which is a biological/physiological mechanism not discussed in the paper. | Mechanism and Pathway Misattribution | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::2761::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 2761 | 19548051 | Does an ultrasound-assisted approach facilitate spinal anesthesia for total joint arthroplasty? | PURPOSE: Spinal anesthesia can be challenging in patients undergoing total joint arthroplasty because of poorly palpable surface landmarks and age-related changes in the lumbar spine. We hypothesized that pre-procedural ultrasound imaging would be effective in identifying the lumbar intervertebral spaces and would prov... | hard | Yes, using ultrasound imaging prior to the procedure effectively aids in performing spinal anesthesia. By visualizing spinal structures and determining precise needle insertion points, the technique leads to high success rates with the majority of individuals requiring only a single attempt to achieve successful dural ... | not_hallucinated | a single attempt | some attempts | The original span reflects the specific finding that 84% of patients achieved dural puncture with exactly one attempt. The replacement span 'some attempts' is vague and fails to reflect the quantitative success rate reported in the study. | Incomplete Information | 0 | -1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::2761::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 2761 | 19548051 | Does an ultrasound-assisted approach facilitate spinal anesthesia for total joint arthroplasty? | PURPOSE: Spinal anesthesia can be challenging in patients undergoing total joint arthroplasty because of poorly palpable surface landmarks and age-related changes in the lumbar spine. We hypothesized that pre-procedural ultrasound imaging would be effective in identifying the lumbar intervertebral spaces and would prov... | hard | Yes, using ultrasound imaging prior to the procedure effectively aids in performing spinal anesthesia. By visualizing spinal structures and determining precise needle insertion points, the technique leads to high success rates with the majority of individuals requiring only some attempts to achieve successful dural pun... | hallucinated | a single attempt | some attempts | The original span reflects the specific finding that 84% of patients achieved dural puncture with exactly one attempt. The replacement span 'some attempts' is vague and fails to reflect the quantitative success rate reported in the study. | Incomplete Information | 0 | -1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::2821::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 2821 | 19555610 | Does prolonged TASER use on exhausted humans worsen markers of acidosis? | OBJECTIVE: There are safety concerns about TASER conducted electrical weapon (CEW) use on humans, and there have been media reports of adverse human outcomes after CEW exposure. Conducted electrical weapons are often used on physically exhausted subjects. A single CEW application of a CEW is generally accepted to be 5 ... | easy | Research indicates that extended exposure to conducted electrical weapons in people who have reached physical exhaustion does not aggravate metabolic acidosis. While participants experienced temporary changes in lactate and pCO2 levels following the application, there was no clinical evidence suggesting that the device... | not_hallucinated | pH status | blood potassium | The study concludes that acidosis theories are not supported because pH did not worsen; however, the study specifically found that potassium levels decreased, not that they were prevented from worsening, and the question specifically asks about markers of acidosis, which pH is the primary indicator of. | Misinterpretation of Question | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::2821::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 2821 | 19555610 | Does prolonged TASER use on exhausted humans worsen markers of acidosis? | OBJECTIVE: There are safety concerns about TASER conducted electrical weapon (CEW) use on humans, and there have been media reports of adverse human outcomes after CEW exposure. Conducted electrical weapons are often used on physically exhausted subjects. A single CEW application of a CEW is generally accepted to be 5 ... | easy | Research indicates that extended exposure to conducted electrical weapons in people who have reached physical exhaustion does not aggravate metabolic acidosis. While participants experienced temporary changes in lactate and pCO2 levels following the application, there was no clinical evidence suggesting that the device... | hallucinated | pH status | blood potassium | The study concludes that acidosis theories are not supported because pH did not worsen; however, the study specifically found that potassium levels decreased, not that they were prevented from worsening, and the question specifically asks about markers of acidosis, which pH is the primary indicator of. | Misinterpretation of Question | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::1993::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 1993 | 24773203 | Does modulation of fatty acid and bile acid metabolism by peroxisome proliferator-activated receptor α protect against alcoholic liver disease? | BACKGROUND: Chronic alcohol intake affects liver function and causes hepatic pathological changes. It has been shown that peroxisome proliferator-activated receptor α (PPARα)-null mice developed more pronounced hepatic changes than wild-type (WT) mice after chronic exposure to a diet containing 4% alcohol. The remarkab... | easy | Research indicates that peroxisome proliferator-activated receptor alpha functions as a safeguard against liver damage caused by alcohol. By promoting adaptive genetic activation, this receptor bolsters mitochondrial performance during extended intake. The findings suggest that targeting this nuclear receptor could pro... | not_hallucinated | regulation of fatty acid oxidation and bile acid | inhibition of fatty acid oxidation and bile acid | The study concludes that PPAR-alpha enhances or induces metabolic pathways (including fatty acid oxidation) to protect the liver, rather than inhibiting them. | Methodological and Evidence Fabrication | 0.0175 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::1993::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 1993 | 24773203 | Does modulation of fatty acid and bile acid metabolism by peroxisome proliferator-activated receptor α protect against alcoholic liver disease? | BACKGROUND: Chronic alcohol intake affects liver function and causes hepatic pathological changes. It has been shown that peroxisome proliferator-activated receptor α (PPARα)-null mice developed more pronounced hepatic changes than wild-type (WT) mice after chronic exposure to a diet containing 4% alcohol. The remarkab... | easy | Research indicates that peroxisome proliferator-activated receptor alpha functions as a safeguard against liver damage caused by alcohol. By promoting adaptive genetic activation, this receptor bolsters mitochondrial performance during extended intake. The findings suggest that targeting this nuclear receptor could pro... | hallucinated | regulation of fatty acid oxidation and bile acid | inhibition of fatty acid oxidation and bile acid | The study concludes that PPAR-alpha enhances or induces metabolic pathways (including fatty acid oxidation) to protect the liver, rather than inhibiting them. | Methodological and Evidence Fabrication | 0.0175 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::3094::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 3094 | 26545365 | Does miR-362-5p promote the malignancy of chronic myelocytic leukaemia via down-regulation of GADD45α? | BACKGROUND: MicroRNAs (miR, miRNAs) play pivotal roles in numerous physiological and pathophysiological contexts. We investigated whether miR-362-5p act as an oncogene in chronic myeloid leukaemia (CML) and aimed to understand its potential underlying mechanisms.
METHODS: We compared the miR-362-5p expression levels b... | easy | Yes, miR-362-5p functions as an oncomiR in chronic myeloid leukaemia by suppressing GADD45α expression. This process subsequently leads to the activation of JNK1/2 and P38 signalling pathways, which drive tumour progression and malignancy. | not_hallucinated | JNK1/2 and P38 signalling pathways | AKT and ERK signalling pathways | The abstract explicitly links miR-362-5p effects to the JNK1/2 and P38 pathways, not AKT or ERK. | Misinterpretation of Question | 0.0625 | -1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::3094::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 3094 | 26545365 | Does miR-362-5p promote the malignancy of chronic myelocytic leukaemia via down-regulation of GADD45α? | BACKGROUND: MicroRNAs (miR, miRNAs) play pivotal roles in numerous physiological and pathophysiological contexts. We investigated whether miR-362-5p act as an oncogene in chronic myeloid leukaemia (CML) and aimed to understand its potential underlying mechanisms.
METHODS: We compared the miR-362-5p expression levels b... | easy | Yes, miR-362-5p functions as an oncomiR in chronic myeloid leukaemia by suppressing GADD45α expression. This process subsequently leads to the activation of AKT and ERK signalling pathways, which drive tumour progression and malignancy. | hallucinated | JNK1/2 and P38 signalling pathways | AKT and ERK signalling pathways | The abstract explicitly links miR-362-5p effects to the JNK1/2 and P38 pathways, not AKT or ERK. | Misinterpretation of Question | 0.0625 | -1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::2098::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 2098 | 24755984 | Does notch pathway target proangiogenic regulator Sox17 to restrict angiogenesis? | RATIONALE: The Notch pathway stabilizes sprouting angiogenesis by favoring stalk cells over tip cells at the vascular front. Because tip and stalk cells have different properties in morphology and function, their transcriptional regulation remains to be distinguished. Transcription factor Sox17 is specifically expresse... | medium | The Notch signaling mechanism limits the formation of new blood vessels by downregulating Sox17. Notch activation inhibits Sox17 levels, preventing excessive sprouting. Conversely, when Notch activity is suppressed, Sox17 expression rises, which promotes vessel growth. This regulatory interaction serves as a critical c... | not_hallucinated | this proangiogenic factor | some regulatory factor | The hallucinated version replaces the specific identification of Sox17 as a proangiogenic factor with a vague term, violating the 'Incomplete Information' requirement to drop the qualifying detail about its specific role. | Incomplete Information | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::2098::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 2098 | 24755984 | Does notch pathway target proangiogenic regulator Sox17 to restrict angiogenesis? | RATIONALE: The Notch pathway stabilizes sprouting angiogenesis by favoring stalk cells over tip cells at the vascular front. Because tip and stalk cells have different properties in morphology and function, their transcriptional regulation remains to be distinguished. Transcription factor Sox17 is specifically expresse... | medium | The Notch signaling mechanism limits the formation of new blood vessels by downregulating Sox17. Notch activation inhibits Sox17 levels, preventing excessive sprouting. Conversely, when Notch activity is suppressed, Sox17 expression rises, which promotes vessel growth. This regulatory interaction serves as a critical c... | hallucinated | this proangiogenic factor | some regulatory factor | The hallucinated version replaces the specific identification of Sox17 as a proangiogenic factor with a vague term, violating the 'Incomplete Information' requirement to drop the qualifying detail about its specific role. | Incomplete Information | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::1980::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 1980 | 24775300 | Does inhibition of fructan-fermenting equine faecal bacteria and Streptococcus bovis by hop ( Humulus lupulus L. ) β-acid? | AIMS: The goals of this study were to determine if β-acid from hops (Humulus lupulus L.) could be used to control fructan fermentation by equine hindgut micro-organisms, and to verify the antimicrobial mode of action on Streptococcus bovis, which has been implicated in fructan fermentation, hindgut acidosis and pasture... | hard | Yes, lupulone concentrations of nine parts per million or higher effectively suppress lactate generation and stabilize pH levels within equine intestinal microbial cultures. This additive specifically targets Streptococcus bovis, reducing its population, metabolic activity, and intracellular potassium retention, thereb... | not_hallucinated | nine parts per million | fifty parts per million | The abstract explicitly states that concentrations greater than or equal to 9 ppm were sufficient for inhibition, whereas 50 ppm is not the threshold identified in the study. | Methodological and Evidence Fabrication | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::1980::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 1980 | 24775300 | Does inhibition of fructan-fermenting equine faecal bacteria and Streptococcus bovis by hop ( Humulus lupulus L. ) β-acid? | AIMS: The goals of this study were to determine if β-acid from hops (Humulus lupulus L.) could be used to control fructan fermentation by equine hindgut micro-organisms, and to verify the antimicrobial mode of action on Streptococcus bovis, which has been implicated in fructan fermentation, hindgut acidosis and pasture... | hard | Yes, lupulone concentrations of fifty parts per million or higher effectively suppress lactate generation and stabilize pH levels within equine intestinal microbial cultures. This additive specifically targets Streptococcus bovis, reducing its population, metabolic activity, and intracellular potassium retention, there... | hallucinated | nine parts per million | fifty parts per million | The abstract explicitly states that concentrations greater than or equal to 9 ppm were sufficient for inhibition, whereas 50 ppm is not the threshold identified in the study. | Methodological and Evidence Fabrication | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::5637::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 5637 | 16531961 | Does pentoxifylline prevent neither liver damage nor early profibrogenic events in a rat model of non-alcoholic steatohepatitis? | BACKGROUND: Non-alcoholic steatohepatitis (NASH) is a metabolic disorder of the liver, which may evolve to fibrosis or cirrhosis. Pentoxifylline (PTX) has been postulated to act as an antifibrogenic agent able to inhibit hepatic stellate cell proliferation and collagen synthesis in vitro. Short-term studies suggest ben... | medium | In the specific animal model of non-alcoholic steatohepatitis examined, the administration of pentoxifylline failed to mitigate hepatic injury or reduce early profibrogenic activity. Researchers observed no meaningful differences in biochemical markers, molecular gene expression, or tissue architecture between the trea... | not_hallucinated | failed to mitigate | successfully mitigated | The abstract explicitly concludes that pentoxifylline does not influence liver injury or profibrogenic events, directly contradicting the claim that it successfully mitigated them. | Misinterpretation of Question | 0 | -1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::5637::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 5637 | 16531961 | Does pentoxifylline prevent neither liver damage nor early profibrogenic events in a rat model of non-alcoholic steatohepatitis? | BACKGROUND: Non-alcoholic steatohepatitis (NASH) is a metabolic disorder of the liver, which may evolve to fibrosis or cirrhosis. Pentoxifylline (PTX) has been postulated to act as an antifibrogenic agent able to inhibit hepatic stellate cell proliferation and collagen synthesis in vitro. Short-term studies suggest ben... | medium | In the specific animal model of non-alcoholic steatohepatitis examined, the administration of pentoxifylline successfully mitigated hepatic injury or reduce early profibrogenic activity. Researchers observed no meaningful differences in biochemical markers, molecular gene expression, or tissue architecture between the ... | hallucinated | failed to mitigate | successfully mitigated | The abstract explicitly concludes that pentoxifylline does not influence liver injury or profibrogenic events, directly contradicting the claim that it successfully mitigated them. | Misinterpretation of Question | 0 | -1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::6330::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 6330 | 17289006 | Is the KCNQ1 potassium channel down-regulated by ubiquitylating enzymes of the Nedd4/Nedd4-like family? | OBJECTIVE: The voltage-gated KCNQ1 potassium channel regulates key physiological functions in a number of tissues. In the heart, KCNQ1 alpha-subunits assemble with KCNE1 beta-subunits forming a channel complex constituting the delayed rectifier current I(Ks). In epithelia, KCNQ1 channels participate in controlling body... | easy | Research indicates that Nedd4 and Nedd4-like ligases actively promote the degradation of KCNQ1 proteins. By targeting a specific PY motif located in the distal C-terminal region of the channel, these enzymes enhance ubiquitylation and reduce current density. This regulatory process effectively controls the stability of... | not_hallucinated | both cardiac and epithelial tissues | various cellular environments | The original span specifies the tissues where the regulatory mechanism was observed or discussed (cardiac and epithelial). The replacement is a vague generalization that obscures the specific tissues mentioned in the abstract, failing to provide the precision found in the original supported text. | Incomplete Information | 0.0364 | -2 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::6330::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 6330 | 17289006 | Is the KCNQ1 potassium channel down-regulated by ubiquitylating enzymes of the Nedd4/Nedd4-like family? | OBJECTIVE: The voltage-gated KCNQ1 potassium channel regulates key physiological functions in a number of tissues. In the heart, KCNQ1 alpha-subunits assemble with KCNE1 beta-subunits forming a channel complex constituting the delayed rectifier current I(Ks). In epithelia, KCNQ1 channels participate in controlling body... | easy | Research indicates that Nedd4 and Nedd4-like ligases actively promote the degradation of KCNQ1 proteins. By targeting a specific PY motif located in the distal C-terminal region of the channel, these enzymes enhance ubiquitylation and reduce current density. This regulatory process effectively controls the stability of... | hallucinated | both cardiac and epithelial tissues | various cellular environments | The original span specifies the tissues where the regulatory mechanism was observed or discussed (cardiac and epithelial). The replacement is a vague generalization that obscures the specific tissues mentioned in the abstract, failing to provide the precision found in the original supported text. | Incomplete Information | 0.0364 | -2 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::7583::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 7583 | 22782238 | Are multi-stemmed trees of Nothofagus pumilio second-growth forest in Patagonia formed by highly related individuals? | BACKGROUND AND AIMS: Multi-stemmed trees (tree clusters) in Nothofagus pumilio, a dominant tree species in Patagonia, are very uncommon and are restricted to the edge of second-growth forests following human-provoked fires. No vegetative reproduction has been reported so far. The genetic structure of multi-stemmed tree... | easy | Research indicates that Nothofagus pumilio clusters in these regions consist of stems sharing identical genotypes alongside other stems that exhibit high degrees of kinship. Specifically, researchers observed that all sampled clusters contained full siblings, while remaining stems frequently shared half-sibling relatio... | not_hallucinated | high degrees of kinship | some levels of kinship | The original text specifies that the stems were highly related (full or half siblings), whereas the replacement implies a vaguer, lower level of relatedness that contradicts the findings of high relatedness values observed in the study. | Incomplete Information | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::7583::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 7583 | 22782238 | Are multi-stemmed trees of Nothofagus pumilio second-growth forest in Patagonia formed by highly related individuals? | BACKGROUND AND AIMS: Multi-stemmed trees (tree clusters) in Nothofagus pumilio, a dominant tree species in Patagonia, are very uncommon and are restricted to the edge of second-growth forests following human-provoked fires. No vegetative reproduction has been reported so far. The genetic structure of multi-stemmed tree... | easy | Research indicates that Nothofagus pumilio clusters in these regions consist of stems sharing identical genotypes alongside other stems that exhibit some levels of kinship. Specifically, researchers observed that all sampled clusters contained full siblings, while remaining stems frequently shared half-sibling relation... | hallucinated | high degrees of kinship | some levels of kinship | The original text specifies that the stems were highly related (full or half siblings), whereas the replacement implies a vaguer, lower level of relatedness that contradicts the findings of high relatedness values observed in the study. | Incomplete Information | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::1308::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 1308 | 25074339 | Does peroxiredoxin II negatively regulate lipopolysaccharide-induced osteoclast formation and bone loss via JNK and STAT3? | AIMS: Lipopolysaccharide (LPS) is considered a prominent pathogenic factor in inflammatory bone diseases. LPS challenge contributes to the production of reactive oxygen species (ROS) in diverse inflammatory diseases. However, its mechanism remains to be clarified in bone. Thus, we investigated the critical mechanism of... | hard | Yes, research indicates that peroxiredoxin II functions as a negative regulator of this process. In the absence of this enzyme, reactive oxygen species production increases, which leads to heightened activation of both JNK and STAT3 pathways. This signaling cascade subsequently promotes the expression of key osteoclast... | not_hallucinated | experimental mouse models | clinical human trials | The abstract explicitly states that the research involved PrxII-deficient mice and in vitro cell studies, not human clinical trials. | Methodological and Evidence Fabrication | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::1308::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 1308 | 25074339 | Does peroxiredoxin II negatively regulate lipopolysaccharide-induced osteoclast formation and bone loss via JNK and STAT3? | AIMS: Lipopolysaccharide (LPS) is considered a prominent pathogenic factor in inflammatory bone diseases. LPS challenge contributes to the production of reactive oxygen species (ROS) in diverse inflammatory diseases. However, its mechanism remains to be clarified in bone. Thus, we investigated the critical mechanism of... | hard | Yes, research indicates that peroxiredoxin II functions as a negative regulator of this process. In the absence of this enzyme, reactive oxygen species production increases, which leads to heightened activation of both JNK and STAT3 pathways. This signaling cascade subsequently promotes the expression of key osteoclast... | hallucinated | experimental mouse models | clinical human trials | The abstract explicitly states that the research involved PrxII-deficient mice and in vitro cell studies, not human clinical trials. | Methodological and Evidence Fabrication | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::4085::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 4085 | 12767664 | Is hypertrophic cardiomyopathy due to sarcomeric gene mutations characterized by impaired energy metabolism irrespective of the degree of hypertrophy? | OBJECTIVES: We investigated cardiac energetics in subjects with mutations in three different familial hypertrophic cardiomyopathy (HCM) disease genes, some of whom were nonpenetrant carriers without hypertrophy, using phosphorus-31 magnetic resonance spectroscopy.
BACKGROUND: Familial hypertrophic cardiomyopathy is ca... | medium | Yes, individuals with these genetic mutations demonstrate a significant reduction in cardiac energy markers. Phosphorus-31 magnetic resonance spectroscopy reveals that this decline in the ratio of phosphocreatine to adenosine triphosphate occurs uniformly across various genetic subtypes. Notably, these metabolic defici... | not_hallucinated | bioenergetic imbalance | excessive calcium signaling | The abstract specifically attributes the findings to a bioenergetic deficit and does not mention or investigate calcium signaling as the underlying mechanism. | Mechanism and Pathway Misattribution | 0.0164 | 1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::4085::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 4085 | 12767664 | Is hypertrophic cardiomyopathy due to sarcomeric gene mutations characterized by impaired energy metabolism irrespective of the degree of hypertrophy? | OBJECTIVES: We investigated cardiac energetics in subjects with mutations in three different familial hypertrophic cardiomyopathy (HCM) disease genes, some of whom were nonpenetrant carriers without hypertrophy, using phosphorus-31 magnetic resonance spectroscopy.
BACKGROUND: Familial hypertrophic cardiomyopathy is ca... | medium | Yes, individuals with these genetic mutations demonstrate a significant reduction in cardiac energy markers. Phosphorus-31 magnetic resonance spectroscopy reveals that this decline in the ratio of phosphocreatine to adenosine triphosphate occurs uniformly across various genetic subtypes. Notably, these metabolic defici... | hallucinated | bioenergetic imbalance | excessive calcium signaling | The abstract specifically attributes the findings to a bioenergetic deficit and does not mention or investigate calcium signaling as the underlying mechanism. | Mechanism and Pathway Misattribution | 0.0164 | 1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::6622::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 6622 | 17295922 | Does quantum dot-induced cell death involve Fas upregulation and lipid peroxidation in human neuroblastoma cells? | BACKGROUND: Neuroblastoma, a frequently occurring solid tumour in children, remains a therapeutic challenge as existing imaging tools are inadequate for proper and accurate diagnosis, resulting in treatment failures. Nanoparticles have recently been introduced to the field of cancer research and promise remarkable impr... | hard | Research indicates that quantum dot exposure triggers toxicity in human neuroblastoma cells through two primary pathways. The mechanism involves the increased expression of the Fas receptor on cell membranes, coupled with the oxidation of lipids. These peroxidized lipids subsequently accumulate within the mitochondria,... | not_hallucinated | Fas receptor | Toll-like receptor | The abstract explicitly attributes the toxicity mechanism to Fas receptor upregulation, not Toll-like receptors. | Mechanism and Pathway Misattribution | 0 | 1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::6622::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 6622 | 17295922 | Does quantum dot-induced cell death involve Fas upregulation and lipid peroxidation in human neuroblastoma cells? | BACKGROUND: Neuroblastoma, a frequently occurring solid tumour in children, remains a therapeutic challenge as existing imaging tools are inadequate for proper and accurate diagnosis, resulting in treatment failures. Nanoparticles have recently been introduced to the field of cancer research and promise remarkable impr... | hard | Research indicates that quantum dot exposure triggers toxicity in human neuroblastoma cells through two primary pathways. The mechanism involves the increased expression of the Toll-like receptor on cell membranes, coupled with the oxidation of lipids. These peroxidized lipids subsequently accumulate within the mitocho... | hallucinated | Fas receptor | Toll-like receptor | The abstract explicitly attributes the toxicity mechanism to Fas receptor upregulation, not Toll-like receptors. | Mechanism and Pathway Misattribution | 0 | 1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::1682::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 1682 | 25091364 | Does nerve ultrasound depict peripheral nerve enlargement in patients with genetically distinct Charcot-Marie-Tooth disease? | OBJECTIVE: To elucidate the ultrasound (US) features of peripheral nerves including nerve roots in patients with different types of Charcot-Marie-Tooth disease (CMT), and the association between US findings, clinical features and parameters of nerve conduction studies (NCS) in CMT1A.
METHODS: US of median, sural and g... | medium | Yes, ultrasound evaluation effectively identifies nerve thickening across various Charcot-Marie-Tooth variants. Research indicates that while patients with CMT1A show broad nerve enlargement, specific subtypes like NEFL-associated disease do not display similar increases in cross-sectional area, highlighting distinct m... | not_hallucinated | do not display | do display | The abstract explicitly states that nerve cross-sectional area was not increased in patients with NEFL-associated CMT, meaning the hallucinated answer contradicts the provided data. | Misinterpretation of Question | 0 | -1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::1682::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 1682 | 25091364 | Does nerve ultrasound depict peripheral nerve enlargement in patients with genetically distinct Charcot-Marie-Tooth disease? | OBJECTIVE: To elucidate the ultrasound (US) features of peripheral nerves including nerve roots in patients with different types of Charcot-Marie-Tooth disease (CMT), and the association between US findings, clinical features and parameters of nerve conduction studies (NCS) in CMT1A.
METHODS: US of median, sural and g... | medium | Yes, ultrasound evaluation effectively identifies nerve thickening across various Charcot-Marie-Tooth variants. Research indicates that while patients with CMT1A show broad nerve enlargement, specific subtypes like NEFL-associated disease do display similar increases in cross-sectional area, highlighting distinct morph... | hallucinated | do not display | do display | The abstract explicitly states that nerve cross-sectional area was not increased in patients with NEFL-associated CMT, meaning the hallucinated answer contradicts the provided data. | Misinterpretation of Question | 0 | -1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::7137::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 7137 | 24588082 | Does tLR4 contribute to the host response to Klebsiella intraocular infection? | PURPOSE/AIM: Klebsiella pneumoniae causes a blinding infection called endogenous endophthalmitis. The role of innate immune recognition of K. pneumoniae in the eye during infection is not known. We hypothesized that intraocular recognition of K. pneumoniae was mediated by Toll-like receptor (TLR)-4 and may be dependent... | medium | Toll-like receptor four plays a significant part in the initial host defense against ocular Klebsiella infections. Studies demonstrate that this receptor is vital for the early detection of the pathogen and the subsequent triggering of inflammatory processes within the eye, independent of the specific bacterial strain ... | not_hallucinated | inflammatory processes | adaptive immunity | The abstract discusses innate immune recognition, TLR4-mediated neutrophil recruitment, and cytokine/chemokine responses, which are components of the innate immune system, not adaptive immunity. | Mechanism and Pathway Misattribution | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::7137::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 7137 | 24588082 | Does tLR4 contribute to the host response to Klebsiella intraocular infection? | PURPOSE/AIM: Klebsiella pneumoniae causes a blinding infection called endogenous endophthalmitis. The role of innate immune recognition of K. pneumoniae in the eye during infection is not known. We hypothesized that intraocular recognition of K. pneumoniae was mediated by Toll-like receptor (TLR)-4 and may be dependent... | medium | Toll-like receptor four plays a significant part in the initial host defense against ocular Klebsiella infections. Studies demonstrate that this receptor is vital for the early detection of the pathogen and the subsequent triggering of adaptive immunity within the eye, independent of the specific bacterial strain used. | hallucinated | inflammatory processes | adaptive immunity | The abstract discusses innate immune recognition, TLR4-mediated neutrophil recruitment, and cytokine/chemokine responses, which are components of the innate immune system, not adaptive immunity. | Mechanism and Pathway Misattribution | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::348::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 348 | 25433485 | Does ancient DNA provide new insight into the maternal lineages and domestication of Chinese donkeys? | BACKGROUND: The donkey (Equus asinus) is an important domestic animal that provides a reliable source of protein and method of transportation for many human populations. However, the process of domestication and the dispersal routes of the Chinese donkey are still unclear, as donkey remains are sparse in the archaeolog... | medium | Yes, genetic testing of archaeological specimens reveals that historic Chinese donkeys possessed significant mitochondrial diversity. These animals belonged to two separate maternal groups identified as the Somali and Nubian lineages. The data suggests that the ancestors of these domestic beasts originated from the Afr... | not_hallucinated | Somali and Nubian lineages | common wild lineages | The abstract specifically identifies the two maternal lineages as Somali and Nubian; 'common wild lineages' is a vague substitution that omits the specific findings reported in the study. | Incomplete Information | 0.0328 | -1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::348::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 348 | 25433485 | Does ancient DNA provide new insight into the maternal lineages and domestication of Chinese donkeys? | BACKGROUND: The donkey (Equus asinus) is an important domestic animal that provides a reliable source of protein and method of transportation for many human populations. However, the process of domestication and the dispersal routes of the Chinese donkey are still unclear, as donkey remains are sparse in the archaeolog... | medium | Yes, genetic testing of archaeological specimens reveals that historic Chinese donkeys possessed significant mitochondrial diversity. These animals belonged to two separate maternal groups identified as the common wild lineages. The data suggests that the ancestors of these domestic beasts originated from the African w... | hallucinated | Somali and Nubian lineages | common wild lineages | The abstract specifically identifies the two maternal lineages as Somali and Nubian; 'common wild lineages' is a vague substitution that omits the specific findings reported in the study. | Incomplete Information | 0.0328 | -1 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::6695::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 6695 | 24608032 | Do eMMPRIN/CD147-encriched membrane vesicles released from malignant human testicular germ cells increase MMP production through tumor-stroma interaction? | BACKGROUND: Elevated levels of EMMPRIN/CD147 in cancer tissues have been correlated with tumor progression but the regulation of its expression is not yet understood. Here, the regulation of EMMPRIN expression was investigated in testicular germ cell tumor (TGCTs) cell lines.
METHODS: EMMPRIN expression in seminoma JK... | hard | Yes, membrane vesicles derived from aggressive embryonal carcinoma cells contain higher levels of EMMPRIN compared to those from seminoma cells. When these vesicles are introduced to fibroblasts, they significantly stimulate the production of MMP-2, facilitating communication between the tumor and the surrounding strom... | not_hallucinated | MMP-2 | MMP-9 | The abstract explicitly states that the researchers measured MMP-2 production via zymography and qRT-PCR, never mentioning MMP-9. | Methodological and Evidence Fabrication | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::6695::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 6695 | 24608032 | Do eMMPRIN/CD147-encriched membrane vesicles released from malignant human testicular germ cells increase MMP production through tumor-stroma interaction? | BACKGROUND: Elevated levels of EMMPRIN/CD147 in cancer tissues have been correlated with tumor progression but the regulation of its expression is not yet understood. Here, the regulation of EMMPRIN expression was investigated in testicular germ cell tumor (TGCTs) cell lines.
METHODS: EMMPRIN expression in seminoma JK... | hard | Yes, membrane vesicles derived from aggressive embryonal carcinoma cells contain higher levels of EMMPRIN compared to those from seminoma cells. When these vesicles are introduced to fibroblasts, they significantly stimulate the production of MMP-9, facilitating communication between the tumor and the surrounding strom... | hallucinated | MMP-2 | MMP-9 | The abstract explicitly states that the researchers measured MMP-2 production via zymography and qRT-PCR, never mentioning MMP-9. | Methodological and Evidence Fabrication | 0 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::5521::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 5521 | 16551880 | Is estrogen receptor beta polymorphism associated with prostate cancer risk? | PURPOSE: After cloning of the second estrogen receptor, estrogen receptor beta (ERbeta) in 1996, increasing evidence of its importance in prostate cancer development has been obtained. ERbeta is thought to exert an antiproliferative and proapoptotic effect. We examined whether sequence variants in the ERbeta gene are a... | hard | Research indicates that a specific genetic variant within the promoter region of the estrogen receptor beta gene relates to an increased likelihood of prostate cancer. Analysis of over two thousand subjects revealed that carriers of the rs2987983 variant exhibit a higher risk of developing the disease compared to those... | not_hallucinated | localized tumors | medical conditions | The abstract specifically links the increased risk to localized cancer, whereas 'medical conditions' is an overly broad and vague category that includes unrelated diseases not mentioned in the text. | Incomplete Information | 0.0179 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::5521::hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 5521 | 16551880 | Is estrogen receptor beta polymorphism associated with prostate cancer risk? | PURPOSE: After cloning of the second estrogen receptor, estrogen receptor beta (ERbeta) in 1996, increasing evidence of its importance in prostate cancer development has been obtained. ERbeta is thought to exert an antiproliferative and proapoptotic effect. We examined whether sequence variants in the ERbeta gene are a... | hard | Research indicates that a specific genetic variant within the promoter region of the estrogen receptor beta gene relates to an increased likelihood of prostate cancer. Analysis of over two thousand subjects revealed that carriers of the rs2987983 variant exhibit a higher risk of developing the disease compared to those... | hallucinated | localized tumors | medical conditions | The abstract specifically links the increased risk to localized cancer, whereas 'medical conditions' is an overly broad and vague category that includes unrelated diseases not mentioned in the text. | Incomplete Information | 0.0179 | 0 | 1 |
UTAustin-AIHealth/MedHallu/pqa_artificial::2160::not_hallucinated | UTAustin-AIHealth/MedHallu/pqa_artificial | 2160 | 24777944 | Do rapid chemical characterisation of stilbenes in the root bark of Norway spruce by off-line HPLC/DAD-NMR? | INTRODUCTION: Stilbenes are plant secondary metabolites that have shown promising and varied biological activities. Stilbenes are presently actively studied for the exploitation of this primary raw material resource, involving the concept of biorefining. Methods for the rapid discovery of new and known stilbene structu... | medium | This analytical technique effectively identifies stilbene components within Picea abies root bark. By employing off-line HPLC combined with diode-array detection and nuclear magnetic resonance, researchers successfully characterized major glucosides like trans-isorhapontin and trans-astringin, alongside various aglycon... | not_hallucinated | various aglycones | some organic compounds | The abstract specifically identifies the aglycones as trans-resveratrol, trans-piceatannol, and trans-isorhapontigenin. Changing this to 'some organic compounds' is an Incomplete Information hallucination as it generalizes a specific chemical finding into a vague, uninformative category. | Incomplete Information | 0.0217 | 1 | 1 |
End of preview. Expand in Data Studio
MedHallu twins, rewritten answers
Twin pairs for medical hallucination detection. Each pair shares one PubMed abstract and one question, and holds two answers: a grounded one and a hallucinated one differing by exactly one edited span.
Both answers are generated by the same model in the same call. Neither is
taken from MedHallu or PubMedQA. This replaces
Certops/medhallu-twins-repaired-context,
where the ground-truth answer was a verbatim span of its own context in 99.5% of
rows and string overlap alone separated the classes at AUC 0.9992.
Why the rewrite
PubMedQA is built by a structural split: the abstract is cut at the CONCLUSION heading, that section becomes the answer, everything before it becomes the context. So the answer is always a span of its own source document. Restore the full abstract and you restore the answer; withhold it and the answer is not entailed. There is no third setting, which is why the context could not be patched and the answers had to be replaced.
Leakage gates
Every pair passed these at generation time; failures were regenerated, not kept.
| Gate | Previous dataset | This dataset |
|---|---|---|
| Class separation by answer/context 5-gram overlap | 0.998 | 0.500 |
| Style predicting which twin is hallucinated (AUC) | 0.800 | 0.526 (chance 0.497) |
| Hallucinated twin is shorter | 73% | 20% |
| Within-pair word-count delta, median | -9 | 0 |
Labels come from provenance, not a judge
No model was asked whether an answer is faithful. The hallucinated twin is built
by a recorded edit, and a pair is only kept if the twin rebuilds exactly from the
correct answer with that span swapped. So row_type is known by construction,
and edit_original_span marks precisely which text is wrong.
Splits
| Split | Rows | Pairs |
|---|---|---|
| train | 2998 | 1499 |
| test | 500 | 250 |
Split over pairs, never rows, so both twins stay on one side. Verified disjoint
on row_id and pmid. Test is stratified by difficulty.
Columns
| Column | Meaning |
|---|---|
row_id |
{source_dataset}::{source_id}::{row_type} |
question, context |
shared by both twins of a pair |
answer |
the generated answer for this row |
row_type |
not_hallucinated or hallucinated |
edit_original_span |
the span replaced to create the hallucination |
edit_replaced_with |
what replaced it |
edit_why_unsupported |
why the abstract does not support it |
hallucination_category |
MedHallu taxonomy, kept for comparability |
difficulty |
MedHallu difficulty label |
pmid |
PubMed id of the source abstract |
answer_containment |
5-gram containment of the answer in its context |
twin_length_delta |
word-count difference between the twins |
Caveats
Constructed negatives are a narrower distribution than hallucinations seen in deployment, which are messier and mix true and false content in one sentence. A human-labelled test set is still required before any accuracy claim.
Claim-level reasoning is not generated yet.
- Downloads last month
- 68