background and aims: infertility is one of the most important conditions in reproductive system and there is no reliable estimates for global prevalence of infertility. therefore, knowing the prevalence of infertility is important and can be effective in decision making. methods: we systematically reviewed all published papers in medline database and scopus (1988–2010). univariate and multivari...

smoking has become more prevalent in turkey than it has in those of western countries during the past decade. this study was conducted to make parameter estimations on gender related smoking habits with the minimum of variance. of the ninety-two researches related to smoking habits conducted from 1981 to 2003 in turkey, 60 were deemed appropriate for the application of meta analysis and meta re...

Background and aims: Infertility is one of the most important conditions in reproductive system and there is no reliable estimates for global prevalence of infertility. Therefore, knowing the prevalence of infertility is important and can be effective in decision making. Methods: We systematically reviewed all published papers in Medline database and Scopus (1988–2010). Univariate and multivar...

the aim of present research was examine of relationship between destruction meta-cognitive beliefs and academic achievement of students with test anxiety. for this purpose, 243 girls and boys subjects with test anxiety of 900 students of guidance schools of noshar city were determined as the sample of study. for gathering the data, meta-cognition questionnaire and test anxiety inventory were us...

The metafor package provides functions for conducting meta-analyses in R. The package includes functions for fitting the meta-analytic fixedand random-effects models and allows for the inclusion of moderators variables (study-level covariates) in these models. Meta-regression analyses with continuous and categorical moderators can be conducted in this way. Functions for the Mantel-Haenszel and ...