bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rotavirus A infection in children under five years old with a double health problem: undernutrition and diarrhoea – a cross-sectional study in four provinces of Mozambique
Authors: Chissaque Assucênio , Cassocera Marta , Gasparinho Carolina , Langa Jéronimo Souzinho , Bauhofer Adilson Fernando Loforte , Chilaúle Jorfélia José , João Eva Dora , Munlela Benilde António , Sambo Júlia Assiat Monteiro , Boene Simone Salvador , Djedje Marlene Bernardo , Anapakala Elda Muianga , Guimarães Esperança Lourenço , Bero Diocreciano Matias , Manhique-Coutinho Lena Vânia , Cossa-Moiane Idalécia , Kellogg Timothy A. , Gonçalves Luzia Augusta Pires , de Deus Nilsa 
Published: January 2021

AbstractBackgroundMozambique has a high burden of group A rotavirus (RVA) infection and chronic undernutrition. This study aimed to determine the frequency and potential risk factors for RVA infection in undernourished children under 5 years old with diarrhoea in Mozambique.MethodsThe analysis was conducted using data from March 2015 to December 2017, regarding children under 5 years old with at least one type of undernutrition. Anthropometric measures were used to calculate indices of weight-for-age, weight-for-height and height-for-age through the Z-Scores. RVA results were extracted from the National Diarrhoea Surveillance database. Descriptive statistics, chi-square test was used for qualitative variables and organized in contingency tables and 95% Confidence Intervals (CI) were considered for the calculation of RVA infection proportion and in the multiple logistic regression models to estimate the adjusted odds ratios (AOR).ResultsOf the 842 undernourished children included in the analysis, 27.2% (95% CI: 24.3–30.3%) were positive for RVA. The rate of RVA infection was 42.7% (95% CI: 38.0–47.5%) in the pre-vaccine period, with great reduction to 12.2% (95% CI: 9.4–15.6%) in the post-vaccine period. Most of the RVA undernourished children had severe wasting (33.3%) and severe stunting (32.0%). The risk of infection was significantly high in children from 0 to 11 months (p-value < 0.001) when compared to the age group of 24–59 months. A higher proportion of RVA infection was detected in households with five or more members (p-value = 0.029). Similar proportions of RVA were observed in children fed only by breast milk (34.9%) and breast milk with formula (35.6%). A higher proportion of undernourished HIV-positive children co-infected with RVA (7.4%) was observed.ConclusionsThe frequency of RVA infection in undernourished children declined following the introduction of the vaccine in Mozambique. Beyond the temporal variation, Maputo province, age and crowded households were also associated to RVA infection. A high proportion of RVA infection was observed in children with severe wasting and a triple burden of disease: undernutrition, RVA and HIV, highlighting the need to conduct follow-up studies to understand the long-term impact of these conditions on children’s development.
Evaluation of non-invasive imaging parameters in coronary microvascular disease: a systematic review
Authors: Groepenhoff F. , Klaassen R. G. M. , Valstar G. B. , Bots S. H. , Onland-Moret N. C. , Den Ruijter H. M. , Leiner T. , Eikendal A. L. M. 
Published: January 2021

Abstract
Background
Coronary microvascular dysfunction (CMD) is an important underlying cause of angina pectoris. Currently, no diagnostic tool is available to directly visualize the coronary microvasculature. Invasive microvascular reactivity testing is the diagnostic standard for CMD, but several non-invasive imaging techniques are being evaluated. However, evidence on reported non-invasive parameters and cut-off values is limited. Thus, we aimed to provide an overview of reported non-invasive parameters and corresponding cut-off values for CMD.

Methods
Pubmed and EMBASE databases were systematically searched for studies enrolling patients with angina pectoris without obstructed coronary arteries, investigating at least one non-invasive imaging technique to quantify CMD. Methodological quality assessment of included studies was performed using QUADAS-2.

Results
Thirty-seven studies were included. Ten cardiac magnetic resonance studies reported MPRI and nine positron emission tomography (PET) and transthoracic echocardiography (TTE) studies reported CFR. Mean MPRI ranged from 1.47 ± 0.36 to 2.01 ± 0.41 in patients and from 1.50 ± 0.47 to 2.68 ± 0.49 in controls without CMD. Reported mean CFR in PET and TTE ranged from 1.39 ± 0.31 to 2.85 ± 1.35 and 1.69 ± 0.40 to 2.40 ± 0.40 for patients, and 2.68 ± 0.83 to 4.32 ± 1.78 and 2.65 ± 0.65 to 3.31 ± 1.10 for controls, respectively.

Conclusions
This systematic review summarized current evidence on reported parameters and cut-off values to diagnose CMD for various non-invasive imaging modalities. In current clinical practice, CMD is generally diagnosed with a CFR less than 2.0. However, due to heterogeneity in methodology and reporting of outcome measures, outcomes could not be compared and no definite reference values could be provided.
Intrinsic brain abnormalities of irritable bowel syndrome with diarrhea: a preliminary resting-state functional magnetic resonance imaging study
Authors: Ao Weiqun , Cheng Yougen , Chen Mingxian , Wei Fuquan , Yang Guangzhao , An Yongyu , Mao Fan , Zhu Xiandi , Mao Guoqun 
Published: January 2021

Abstract
Background
The aim of the present study was to explore the brain active characteristics of patients with irritable bowel syndrome with diarrhea (IBS-D) using resting-state functional magnetic resonance imaging technology.

Methods
Thirteen IBS-D patients and fourteen healthy controls (HC) were enrolled. All subjects underwent head MRI examination during resting state. A voxel-based analysis of fractional amplitude of low frequency fluctuation (fALFF) maps between IBS-D and HC was performed using a two-sample t-test. The relationship between the fALFF values in abnormal brain regions and the scores of Symptom Severity Scale (IBS-SSS) were analyzed using Pearson correlation analysis.

Results
Compared with HC, IBS-D patients had lower fALFF values in the left medial superior frontal gyrus and higher fALFF values in the left hippocampus and right precuneus. There was a positive correlation between the duration scores of IBS-SSS and fALFF values in the right precuneus.

Conclusion
The altered fALFF values in the medial superior frontal gyri, left hippocampus and right precuneus revealed changes of intrinsic neuronal activity, further revealing the abnormality of gut-brain axis of IBS-D.
Genetic identification of inherited cystic kidney diseases for implementing precision medicine: a study protocol for a 3-year prospective multicenter cohort study
Authors: Park Hayne Cho , Ryu Hyunjin , Kim Yong-Chul , Ahn Curie , Lee Kyu-Beck , Kim Yeong Hoon , Kim Yunmi , Han Seungyeup , Kim Yaerim , Bae Eun hui , Ma Seong Kwon , Kang Hee Gyung , Ahn Yo Han , Park Eujin , Jeong Kyungjo , Lee Jaewon , Choi Jungmin , Oh Kook-Hwan , Oh Yun Kyu 
Published: January 2021

Abstract
Background
Inherited cystic kidney disease is a spectrum of disorders in which clusters of renal cysts develop as the result of genetic mutation. The exact methods and pipelines for defining genetic mutations of inherited cystic kidney disease are not clear at this point. This 3-year, prospective, multicenter, cohort study was designed to set up a cohort of Korean patients with inherited cystic kidney disease, establish a customized genetic analysis pipeline for each disease subtype, and identify modifying genes associated with the severity of the disease phenotype.

Methods/design
From May 2020 to May 2022, we aim to recruit 800 patients and their family members to identify pathogenic mutations. Patients with more than 3 renal cysts in both kidneys are eligible to be enrolled. Cases of simple renal cysts and acquired cystic kidney disease that involve cyst formation as the result of renal failure will be excluded from this study. Demographic, laboratory, and imaging data as well as family pedigree will be collected at baseline. Renal function and changes in total kidney volume will be monitored during the follow-up period. Genetic identification of each case of inherited cystic kidney disease will be performed using a targeted gene panel of cystogenesis-related genes, whole exome sequencing (WES) and/or family segregation studies. Genotype-phenotype correlation analysis will be performed to elucidate the genetic effect on the severity of the disease phenotype.

Discussion
This is the first nationwide cohort study on patients with inherited cystic kidney disease in Korea. We will build a multicenter cohort to describe the clinical characteristics of Korean patients with inherited cystic kidney disease, elucidate the genotype of each disease, and demonstrate the genetic effects on the severity of the disease phenotype.

Trial registration
This cohort study was retrospectively registered at the Clinical Research Information Service (KCT0005580) operated by the Korean Center for Disease Control and Prevention on November 5th, 2020.
Changes in hemodialysis catheter management after introduction of the end-stage renal disease prospective payment system
Authors: Roetker Nicholas S. , Guo Haifeng , Decker-Palmer Marquita R. , Peng Yi , Wetmore James B. 
Published: January 2021

Abstract
Background
We investigated whether implementation of the end-stage renal disease prospective payment system (ESRD PPS) was associated with changes in thrombolytic therapy use and other aspects of catheter management in hemodialysis (HD) patients.

Methods
Using quarterly, period prevalent cohorts of patients undergoing maintenance HD with a catheter in the US Renal Data System (2008–2015), we studied rates of claims for within- and outside-HD-unit thrombolytic use, and thrombus/fibrin sheath removal, and rates of delayed HD treatment after ESRD PPS implementation, January 1, 2011. Associations between PPS implementation and change in trend of rates of each outcome were assessed using covariate-adjusted Poisson regression, using a piecewise linear function for quarter-time (with breakpoint at PPS implementation).

Results
Among an average of 69,428 quarterly catheter users, rates of claims for within-HD-unit thrombolytic use declined from 236.6 (Q1–2008) to 81.4 (Q4–2012) per 100 person-years (P < 0.0001, PPS association with change in trend); rates of claims for thrombus/fibrin sheath removal procedures increased from 3.9 (Q1–2008) to 8.8 (Q3–2015) per 100 person-years (P = 0.0001, PPS association with change in trend). Rates of delayed HD treatment increased from 1.6 (Q2–2008) to 2.3 (Q3–2015) per patient-quarter, although PPS implementation was associated with a decrease in this rising trend (1.6% increase per quarter pre-PPS, 1.2% post-PPS; P < 0.0001, change in trend).

Conclusions
After PPS implementation, thrombolytic use decreased and thrombus/fibrin sheath removal increased. The increasing trend in delayed HD treatment appeared to slow after PPS implementation, but delayed sessions continued to increase year over year for unclear reasons.
Increased risk of preeclampsia after use of paracetamol during pregnancy – causal or coincidence?
Authors: von Hellens Hetti , Keski-Nisula Leea , Sahlman Heidi 
Published: January 2021

Abstract
Background
The maternal use of paracetamol during pregnancy has been associated with the development of preeclampsia. This study aims to clarify whether the connection is causal or whether it is due to reverse causation.

Methods
This study is a continuation of the retrospective case cohort study examining 2,508 pregnant women using a variety of drugs and the development of preeclampsia (1,252 women with preeclampsia and 1,256 controls). For the purposes of this study, more precise data was collected from several hospital databases of the women among this cohort who had reported taking paracetamol during pregnancy (indications, gestational period etc.); this was evaluated in association with the development of preeclampsia.

Results
5.5% (100 cases and 37 controls) of all the study population (2,508) had clearly reported paracetamol use. Women with preeclampsia had used significantly more often paracetamol during pregnancy compared to controls (cases 8.0%, controls 2.9%, p < 0.001). The difference was most evident in the third trimester (after the 29th GW) and the use of paracetamol was associated with both mild and severe preeclampsia. Headache and “general pain” were the most common indications for medication among all paracetamol users.

Conclusions
The use of paracetamol in the third trimester of pregnancy was associated with preeclampsia. This observation indicates that association between paracetamol use and preeclampsia is probably due to reverse causation, i.e. women with preeclampsia experience more headaches due to preeclampsia symptoms since this association was not detected with the use of paracetamol in earlier stages of pregnancy.
Perspectives of policymakers and health providers on barriers and facilitators to skilled pregnancy care: findings from a qualitative study in rural Nigeria
Authors: Udenigwe Ogochukwu , Okonofua Friday E. , Ntoimo Lorretta F. C. , Imongan Wilson , Igboin Brian , Yaya Sanni 
Published: January 2021

Abstract
Background
The uptake of skilled pregnancy care in rural areas of Nigeria remains a challenge amid the various strategies aimed at improving access to skilled care. The low use of skilled health care during pregnancy, childbirth and postpartum indicates that Nigerian women are paying a heavy price as seen in the country’s very high maternal mortality rates. The perceptions of key stakeholders on the use of skilled care will provide a broad understanding of factors that need to be addressed to increase women’s access to skilled pregnancy care. The objective of this study was therefore, to explore the perspectives of policymakers and health workers, two major stakeholders in the health system, on facilitators and barriers to women’s use of skilled pregnancy care in rural Edo State, Nigeria.

Methods
This paper draws on qualitative data collected in Edo State through key informant interviews with 13 key stakeholders (policy makers and healthcare providers) from a range of institutions. Data was analyzed using an iterative process of inductive and deductive approaches.

Results
Stakeholders identified barriers to pregnant women’s use of skilled pregnancy care and they include; financial constraints, women’s lack of decision-making power, ignorance, poor understanding of health, competitive services offered by traditional birth attendants, previous negative experience with skilled healthcare, shortage of health workforce, and poor financing and governance of the health system. Study participants suggested health insurance schemes, community support for skilled pregnancy care, favourable financial and governance policies, as necessary to facilitate women’s use of skilled pregnancy care.

Conclusions
This study adds to the literature, a rich description of views from policymakers and health providers on the deterrents and enablers to skilled pregnancy care. The views and recommendations of policymakers and health workers have highlighted the importance of multi-level factors in initiatives to improve pregnant women’s health behaviour. Therefore, initiatives seeking to improve pregnant women’s use of skilled pregnancy care should ensure that important factors at each distinct level of the social and physical environment are identified and addressed.
Progesterone levels predict pregnancy outcomes in individuals with fallopian tube associated infertility
Authors: Bo Wenjia , Zhang Ning , Wang Ling , Guo Ying , Wu Haicui 
Published: January 2021

Abstract
Background
This study aimed at determining the predictive value of human chorionic gonadotropin and progesterone levels on pregnancy outcomes in patients receiving in vitro fertilization due to fallopian tube associated infertility.

Methods
We retrospectively analyzed the clinical data of 854 cycles due to fallopian tube associated infertility in vitro fertilization fresh embryo transfer. The clinical data had been collected from January 2010 to December 2018 and was divided into 7 groups depending on the progesterone level on human chorionic gonadotropin administration day. Live birth rates and observation trends were calculated. The receiver operating characteristic curve was established to determine the optimal cutoff value for progesterone, which was used to further divide the data into 3 groups; Group 1 (progesterone ≦ 1.0 ng/ml), Group 2 (1.0 ng/ml ≤ progesterone ≤ 1.25 ng/ml), and Group 3 (progesterone ≥ 1.25 ng/ml). We then compared the ovulation results and clinical outcomes among the 3 groups.

Results
There were no significant differences in age, infertility years, gonadotropin dosage, gonadotropin days, Luteinizing hormone level on human chorionic gonadotropin day, 2 pronuclear fertilization rates, clinical pregnancy rates, live birth rates, full-term birth rate, and preterm birth rates among the three groups. However body mass index (p = 0.001), basal luteinizing hormone (p = 0.034), estrogen peak (p < 0.001), number of oocytes obtained (P < 0.001) were significantly different.

Conclusions
Progesterone level on human chorionic gonadotropin day does not affect the clinical pregnancy rate and live birth rates after in vitro fertilization. However, progesterone levels between 1.0 and 1.25 ng/ml may lead to good clinical pregnancy outcomes.
Utility of the optical quality analysis system for decision-making in Nd: YAG laser posterior capsulotomy in patients with light posterior capsule opacity
Authors: Lu Bo , Zhu Weijie , Fan Yu , Shi Dong , Ma Liwei 
Published: January 2021

Abstract
Background
A prospective cohort study was performed to evaluate whether the Optical Quality Analysis System (OQAS) can serve as a valuable additional indicator for appropriate posterior capsulotomy referral.

Methods
One hundred and five eyes from 96 patients undergoing capsulotomy were divided into precapsulotomy logMAR CDVA ≤0.1 group and logMAR CDVA > 0.1 group. CDVA, and the Visual Function 14 index (VF-14) score were estimated before and 1 month after capsulotomy. The objective scattering index (OSI) value was measured by using the OQAS. Posterior capsule opacification (PCO) severity was assessed with Evaluation of PCO 2000 (EPCO 2000) software.

Results
In logMAR CDVA > 0.1 group, the correlations of OSI, logMAR CDVA, EPCO score and VF-14 score were very strong preoperatively. In logMAR CDVA ≤0.1 group, preoperatively, OSI was correlated with logMAR CDVA (r = 0.451), EPCO score (r = 0.789), and VF-14 score (r = 0.852). LogMAR CDVA has weak correlation with VF-14 score (r = − 0.384) and EPCO score (r = 0.566). VF-14 score was correlated with EPCO score (r = − 0.669). In the logMAR CDVA ≤0.1 group, there was no significant difference in logMAR CDVA between precapsulotomy and postcapsulotomy (P > 0.05). In the two groups, all the other optical quality parameters were significantly improved after capsulotomy (P < 0.05). In logMAR CDVA > 0.1 group, the area under the curve of the ROC of the OSI was 0.996 (P = 0.000). In logMAR CDVA ≤0.1 group, the area under the curve of the ROC of the OSI was 0.943 (P = 0.000).

Conclusions
The OSI was useful for evaluating of PCO and prediction of beneficial capsulotomy. Especially for patients with slight PCO and better visual acuity, OSI is more valuable than CDVA and completely objective examination.

Trial registration
The study protocol was registered at the Chinese Clinical Trial Registry. Register: ChiCTR1800018842 (Registered Date: October 13th, 2018).
Longitudinal association between myopia and parental myopia and outdoor time among students in Wenzhou: a 2.5-year longitudinal cohort study
Authors: Jiang Dandan , Lin Haishuang , Li Chunchun , Liu Linjie , Xiao Haishao , Lin Yaoyao , Huang Xiaoqiong , Chen Yanyan 
Published: January 2021

Abstract
Background
To evaluate the impact of parental myopia and outdoor time on myopia among students in Wenzhou.

Methods
We examined 1388 primary students from first grade to third grade in Wenzhou from September 2012 to March 2015. We performed noncycloplegic refractometry on each student every six months and axial length (AL) measurements every year. At the commencement of our study, children were asked to complete a questionnaire regarding near work activity and outdoor activity, whereas parents were asked to complete a self-administered questionnaire regarding their background circumstances and their history of myopia.

Results
A total of 1294 students (93.2%) returned for follow-up examinations. Children with initial and final no myopia spent more time on outdoor activities than those with new onset myopia (1.92 vs. 1.81 h/d, p = 0.022), and elongation of AL in children with a high level (> 2.5 h/day) of outdoor time (0.22 ± 0.13 mm/Y) was less than those with a low level (≤ 1.5 h/day) of outdoor time (0.24 ± 0.14 mm/Y, p = 0.045). The proportion of rapid myopia progression (≤-0.5D/Y) was 16.7%, 20.2% and 31.5% among the children with no myopic parent, one myopic parent and two myopic parents, respectively (X2 = 28.076, p < 0.001), and the elongation of AL in children among different numbers of myopic parents was significantly different (p < 0.001). A high level of outdoor time was a protective factor for children with one myopic parent (HR 0.49, 95% CI 0.27–0.88; p = 0.018).

Conclusions
In this sample, parental myopia and outdoor time were associated with myopia in children. A high level of outdoor time was a protective factor for children with one myopic parent.