background : the present study aimed to provide better insight on methodological issues related to time preference studies, and to estimate private and social discount rates, using a rigorous systematic review and meta-analysis. methods : we searched pubmed, embase and proquest databases in june 2013. all studies had estimated private and social time preference rates for health outcomes through...

conclusions the findings of the meta-epidemiological study support that ebv infection may increase the risk of breast cancer. nested case-control studies are required in the future. results a total of 20 case-control studies were selected, and the total numbers of subjects in the case and control groups were 1947 and 1010, respectively. the findings of this meta-analysis revealed that ebv infec...

background evidence indicates rfc1 g80a polymorphism as a risk factor for a number of cancers. increasing studies have been conducted on the association of rfc1 g80a polymorphism with acute lymphoblastic leukemia (all) risk. however, the results were  controversial. the aim of the present study was to derive a more precise estimation of the relationship.  materials and method pubmed, embase, we...

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  present  meta-analysis  was  conducted  to  provide  a  quantitative  measure  of  the overall effects of task complexity on Chinese EFL learners’ language  production.  Based  on  the strict inclusion criteria, 12 primary  studies  were synthesized according to key  features.  Eleven of them  were  meta-analyzed  to  investigate  effects  of  raising  the  resource-directing  task  comple...

background and objective : restless legs syndrome (rls) is a sensorimotor disorder that causes sleep deprivation. rls is characterized by discomfort in the legs and severe desire to move them during sleep. different prevalence rates about rls are reported in iran. this systematic review and meta-analysis was performed to estimate the prevalence of rls in iran. materials and methods : by searchi...

b a ckground:  scientific literature has shown evidence that omega-3 polyunsaturated  fatty  acids  (pufa)  have  anti-androgenic  action,  and  for  this reason could be useful as an adjuvant in hyperandrogenism conditions including polycystic ovarian syndrome (pcos). however, the possible effect of eicosapentaenoic acid (epa) and docosahexaenoic acid (dha) supplementation on testosterone conc...

results we included 66 eligible studies. the pooled prevalence of hbsag in blood donors of both emro and middle eastern (e and m) countries was 2.03% (95% confidence interval [ci]: 1.79 – 2.26). in addition, the prevalence rates in the emro countries was 1.99% (95% ci: 1.84 – 2.14) and 1.62% in the middle eastern countries (95% ci: 1.36 – 1.88). the prevalence among blood donors with more than ...

conclusions among the treatment regimens containing dcv, dcv/sof has the highest svr rate for the treatment of infection with different hcv genotypes in different patient contexts; thus, this regimen shows promise for the treatment of hcv infections. results we found six different regimens containing dcv: dcv/asunaprevir (asv), dcv/asv/beclubavir, dcv/pegylated interferon lambda or alpha/rbv wi...

context there is growing evidence that interferon lambda 4 (ifnl4) polymorphism is related to sustained virological response (svr) in hepatitis c virus (hcv) infection. we analyzed the relationship between ifnl4 (rs368234815) polymorphism and svr in dual- and triple- therapy in hcv genotype 1, 2, 3 and 4 infected asian, caucasian and african patients. conclusions favorable ifnl4 rs368234815 gen...