382,215 papers found

Integrating multiple observational studies to make unconfounded causal or descriptive comparisons of group potential outcomes in a large natural population is challenging. Moreover, retrospective cohorts, being convenience samples, are usually unrepresentative of the natural population of interest and have groups with…

Stereotype threat is a well-known construct in psychology wherein individuals who belong to a negatively stereotyped demographic group underperform on cognitive or academic tasks due to the detrimental effects of a stereotype. Many psychologists have suggested that stereotype threat may be one of the reasons that some…

SUMMARY: This article introduces the metaGWASmanager, which streamlines genome-wide association studies within large-scale meta-analysis consortia. It is a toolbox for both the central consortium analysis group and participating studies to generate homogeneous phenotypes, minimize unwanted variability from inconsistent…

Bayesian methods are widely used in the GWAS meta-analysis. But the considerable consumption in both computing time and memory space poses great challenges for large-scale meta-analyses. In this research, we propose an algorithm named SMetABF to rapidly obtain the optimal ABF in the GWAS meta-analysis, where shotgun st…

Subjective narrative review articles have an educational and informative role in medical and scientific journals. Systematic review of the literature requires an objective and complete review of all available publications on an identified topic. Systematic review that undergoes meta-analysis aims to provide a complete…

BACKGROUND: The proposed sequential and combinatorial algorithm, suggested as a standard tool for assessing, exploring, and reporting heterogeneity in the meta-analysis, is useful but time-consuming particularly when the number of included studies is large. Metaplot is a novel graphical approach that facilitates perfor…

BACKGOUN: Asthma and dry eye disease are common clinical diseases. Studies have shown that asthma is related to dry eye, but there is no high-quality evidence-based medical evidence. METHOD: This protocol and final study will be conducted in accordance with the Preferred Reporting Items for Systematic review and Meta-…

In randomized controlled trials (RCTs), endpoint scores, or change scores representing the difference between endpoint and baseline, are values of interest. These values are compared between experimental and control groups, yielding a mean difference between the experimental and control groups for each outcome that is…

BACKGROUND: Cervical spondylotic radiculopathy (CSR) is one of the most common public health concerns in the world. Baduanjin is very widely and popularly practiced for the management of CSR. Therefore, we conducted a systematic review and meta-analysis to investigate the efficacy of Baduanjin exercise for patients wit…

INTRODUCTION: Accumulating neuroimaging studies have found abnormal cerebral activity in migraine patients. However, the findings of studies exist many differences. Hence, this protocol aims to investigate concurrence across the neuroimaging studies to verify the functional cerebral alterations based on the latest evid…

BACKGROUND: Hematoma expansion (HE) is related to clinical deterioration and unfavorable prognosis in intracerebral hemorrhage (ICH). Some studies have revealed that low serum magnesium level is associated with larger hematoma volume at admission, HE, and unfavorable outcomes. However, the conclusions remain unsettled.…

OBJECTIVE: Meta-analysis is of fundamental importance to obtain an unbiased assessment of the available evidence. In general, the use of meta-analysis has been increasing over the last three decades with mental health as a major research topic. It is then essential to well understand its methodology and interpret its r…

Standard models for network meta-analysis simultaneously estimate multiple relative treatment effects. In practice, after estimation, these multiple estimates usually pass through a formal or informal selection procedure, eg, when researchers draw conclusions about the effects of the best performing treatment in the ne…

BACKGROUND: The treatment methods about surgery, chemotherapy, and radiation therapy were recommended for gastric cancer (GC) patients by National Comprehensive Cancer Network (NCCN) guidelines. However, for the advanced gastric cancer patients or with metastatic lesions who have lost their chance of surgery, the curre…

BACKGROUND: Pulmonary arterial hypertension (PAH) is an incurable disease with high mortality. Although most studies recommend anticoagulation treatment for idiopathic pulmonary arterial hypertension (IPAH), the survival benefits are uncertain. Therefore, the present paper provides a protocol to investigate this issue…

Meta-analysis is the quantitative, scientific synthesis of research results. Since the term and modern approaches to research synthesis were first introduced in the 1970s, meta-analysis has had a revolutionary effect in many scientific fields, helping to establish evidence-based practice and to resolve seemingly contra…

Meta-analysis can necessitate the combination of parallel and cross-over trial designs. Because of the differences in the trial designs and potential biases notably associated with the crossover trials, one often combines trials of the same designs only, which decreases the power of the meta-analysis. To combine result…

INTRODUCTION: Preserving cognitive health is a crucial aspect of healthy ageing. Both abnormal and normal cognitive decline can adversely affect the health of ageing populations. Evidence suggests religious involvement (RI) can preserve cognition in ageing populations. The primary purpose of this review is to examine t…

The off-pump literature is divided into three eras: the "early phase" with results favouring off-pump surgery supported with randomized control trials (RCTs) mainly from Bristol, UK; an "intermediate phase" dominated by the results of the ROOBY trial and finally a more "contemporary phase" whereby the off/on-pump argum…

In this paper we propose a new method to analyze time-to-event data in longitudinal genetic studies. This method address the fundamental problem of incorporating uncertainty when analyzing survival data and imputed single-nucleotide polymorphisms (SNPs) from genome-wide association studies (GWAS). Our method incorporat…