conclusions primary dysmenorrhea is a common problem in iran however, there are only a few studies regarding secondary dysmenorrhea prevalence. moreover, there is a significant variation between the results of the studies on the primary dysmenorrhea prevalence. therefore, further evidence-based data on national studies is needed to estimate the exact estimation of dysmenorrhea prevalence in ira...

Meta-discourse markers are an inevitable part of oral proficiency which improve both the quality and comprehension of learners’ speech. While studies of oral meta-discourse have been conducted since the 1980s in a European or US context, they have remained relatively untouched in Iran. Therefore, this study aimed to seek the impact of both explicit and implicit teaching of formal meta-discourse...

normal 0 false false false en-us x-none ar-sa previous studies have inspected the associations between adiponectin (adipoq) 276g/t polymorphisms and atherosclerosis, but the results are inconclusive. the aim of this study was to explore the relationship between polymorphism +276 g > t (rs1501299) in adipoq and atherosclerosis. a widespread search was directed to identify all studies on the asso...

smoking is known as a major cause of chronic obstructive pulmonary disease (copd) and hence immediate and effective interventions are required for its elimination. this study aimed to collect valid data with regard to cigarette smoking in adult population of north of iran for policy making by a meta-analysis of the documents of national non-communicable disease risk factors surveillance system....

aim and background: this meta-analysis evaluated the relationship between mental health and social support in iran. methods and materials: in order to assess the relationship between mental health and social support, eight eligible studies with acceptable methodology were selected. findings: the effect size of the relationship between mental health and social support in iran was 0.369. conclusi...

background & aim : worldwide prevalence of infertility has been reported to be 3-7% of all couples. there are varieties among the results of studies conducted on the prevalence of infertility in iran. the present study aimed to evaluate the trend of infertility using meta-analysis method in iran. methods & materials : we systematically reviewed all published papers in medline database of the na...

although decisions or inferences we make based on test scores depend both on characteristics of test-takers and of testing sit- uations, there is just little research which has been undertaken on the effects of these characteristics on test performance (e.g., in’nami, 2006). the effect of listening strategies on listening performance is also unde- niable (vandergrift, 1997). thus, considering t...

conclusions our results showed that hcv genotype 4 is the most prevalent genotype in the middle east region. however, hcv genotype 1 is the most prevalent among non-arab countries in the region including turkey, iran, cyprus, and israel. context the hepatitis c virus (hcv) is classified into seven genotypes and more than 100 subtypes. the treatment regimen, duration and efficacy of hcv therapy ...

background: several epidemiological studies suggest that tobacco smoking increases the risk of oral cancer. no systematic review, however, has been reported to examine how consistent the evidence is across the studies. we undertook a meta-analysis of epidemiological studies investigating the magnitude relationship between tobacco smoking and oral cancer. methods: primary studies were identified...