Meta-analysis using individual participant data (IPD) obtains and synthesises the raw, participant-level data from a set of relevant studies. The IPD approach is becoming an increasingly popular tool as an alternative to traditional aggregate data meta-analysis, especially as it avoids reliance on published results and provides an opportunity to investigate individual-level interactions, such a...

background: these findings from several observational studies, investigated the association between red meat consumption and gliomas, were inconsistent. we conducted a systematic review and meta-analysis of observational studies to summarize available date on the relation between meat intake and risk of glioma. materials and methods: a systematic literature search of relevant reports published ...

background: numerous studies have evaluated the association between the angiotensinogen (agt) t174m polymorphism and ischemic stroke(is) risk. however, the specific association is still controversial. materials and methods: in order to explore this association more deeply, we performed a meta-analysis. all of the relevant studies were identified from pubmed, embase, and chinese national knowled...

introduction: the prevalence of iran deficiency anemia (ida) in pregnant women is in variable between 40-80% in developing countries. there are some differences among different studies on this disorder. so, this present study is been performed for evaluating the prevalence of ida among pregnant iranians with systematic review and meta analysis method. method: this study is based on received inf...

meta-analysis enables researchers to analyze the findings of studies related to the specific area in the form of a specific research question. based on the results of these reviews for the specific subject, development of new theories and experimental models is provided. often, by exploring studies in a particular field, we encounter a large number of studies which were conducted on the same va...

background: the effects of the vascular endothelial growth factor (vegf) gene ?2578c/a polymorphism on colorectal cancer (crc) risk have been investigated in some studies; however, the results of these studies were conflicting and ambiguous. therefore, we aimed to do a meta-analysis to investigate the association of vegf ?2578c/a polymorphisms with crc risk from all eligible case-control studie...

introduction: oral contraceptives (ocs) are considered as one of the most common risk factor of venous thromboembolism (vte) in child bearing age. some of the recent researches indicate that the odds of vte may be even higher with newer generations of ocs. the present meta-analysis was designed to evaluate the effect of different generation of ocs on the occurrence of vte. methods: two research...

objective: taking the diversity of the methodologies applied in prevalence studies of psychiatric disorders in iran and their heterogeneous results into consideration, there seems to be need for a systematic review in order to compile the findings and seek appropriate recommendations for future studies. this study aims at systematically identifying studies conducted in iran describing the preva...

several studies have been conducted in iran in order to investigate the prevalence of depression among infertile couples. however, there is a remarkable diversity among the results. this meta-analysis was conducted to estimate an overall prevalence rate of depression among infertile couples in iran.international and national electronic databases were searched up to june 2011 including medline, ...