Given a passage with a context and an answer, construct a question on the basis of the information present in the passage. Construct the question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) it answer uses text phrases from the passage. Avoid creating questions that (i) can't be answered correctly without actually understanding the passage and (ii) uses the same words or phrases given in the passage.
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Question: Context: Diabetic retinopathy (DR) is a retinopathy resulting from diabetes mellitus (DM) which was classified into non-proliferative DR (NPDR) and proliferative DR (PDR). Without an early screening and effective diagnosis, patients with PDR will develop serious complications. Therefore, we sought to identify special serum microRNAs (miRNAs) that can serve as a novel non-invasive screening signature of PDR and test its specificity and sensitivity in the early diagnosis of PDR.', 'In total, we obtained serum samples from 90 PDR cases, 90 matched NPDR patients and 20 controls. An initial screening of miRNA expression was performed through TaqMan Low Density Array (TLDA). The candidate miRNAs were validated by individual reverse transcription quantitative real-time PCR (RT-qPCR) arranged in an initial and a two-stage validation sets. Moreover, additional double-blind testing was performed in 20 patients clinically suspected of having DR to evaluate the diagnostic value and accuracy of the serum miRNA profiling system in predicting PDR.', 'Three miRNAs were significantly increased in patients with PDR compared with NPDR after the multiple stages. The areas under the receiver operating characteristic (ROC) curves of the validated three-serum miRNAs signature were 0.830, 0.803 and 0.873 in the initial and two validation sets, respectively. Combination of miR-21, miR-181c, and miR-1179 possessed a moderate ability to discrimination between PDR and NPDR with an area under ROC value of 0.89. The accuracy rate of the three-miRNA profile as PDR signature was 82.6%.
Answer: These data provide evidence that serum miRNAs have the potential to be sensitive, cost-effective biomarkers for the early detection of PDR. These biomarkers could serve as a dynamic monitoring factor for detecting the progression of PDR from NPDR.

Answer: Do serum miRNA biomarkers serve as a fingerprint for proliferative diabetic retinopathy?

Question: Context: The present meta-analysis aimed to investigate whether there is an association between SERPINE1 rs1799768 polymorphism and sepsis risk and mortality.', 'Published reports were searched in PubMed, PubMed Central, Gene, PubChem and Google Scholar. Odds ratios (ORs) and corresponding 95% confidence intervals (CIs) were assessed in a random-effects model.', 'The results of the overall meta-analysis indicated that an increased sepsis risk was evidently associated with SERPINE1 rs1799768 polymorphism (OR = 1.30; 95% CI 1.08-1.56; p = 0.006). When studies were stratified by ethnicity, no significant association was observed between SERPINE1 rs1799768 polymorphism and sepsis risk in the Asian group. As for the Caucasian population, overall OR was 1.24 (95% CI 1.02-1.51; p = 0.03). The results of the overall meta-analysis indicated that an increased sepsis mortality risk was evidently associated with SERPINE1 rs1799768 polymorphism (OR = 1.73; 95% CI 1.31-2.28; p < 0.0001). When studies were stratified by ethnicity, significant association was observed between SERPINE1 rs1799768 polymorphism and sepsis risk mortality in the Asian group and the Caucasian population.
Answer: In conclusion, the meta-analysis suggests that there are significant associations between SERPINE1 rs1799768 polymorphism and risk of sepsis and sepsis mortality.

Answer: Does sERPINE1 rs1799768 polymorphism contribute to sepsis risk and mortality?

Question: Context: Cerebral pressure passivity (CPP) in sick newborns can be detected by evaluating coupling between mean arterial pressure (MAP) and cerebral blood flow measured by near infra-red spectroscopy hemoglobin difference (HbD). However, continuous MAP monitoring requires invasive catheterization with its inherent risks. We tested whether heart rate (HR) could serve as a reliable surrogate for MAP in the detection of CPP in sick newborns.', 'Continuous measurements of MAP, HR, and HbD were made and partitioned into 10-min epochs. Spectral coherence (COH) was computed between MAP and HbD (COHMAP-HbD) to detect CPP, between HR and HbD (COHHR-HbD) for comparison, and between MAP and HR (COHMAP-HR) to quantify baroreflex function (BRF). The agreement between COHMAP-HbD and COHHR-HbD was assessed using ROC analysis.', 'We found poor agreement between COHMAP-HbD and COHHR-HbD in left hemisphere (area under the ROC curve (AUC) 0.68) and right hemisphere (AUC 0.71). Baroreflex failure (COHMAP-HR not significant) was present in 79% of epochs. Confining comparison to epochs with intact BRF showed an AUC of 0.85 for both hemispheres.
Answer: In these sick newborns, HR was an unreliable surrogate for MAP required for the detection of CPP. This is likely due to the prevalence of BRF failure in these infants.

Answer:
Does baroreflex dysfunction in sick newborns make heart rate an unreliable surrogate for blood pressure changes?