conclusions: about half the population in iran is infected with helicobacter pylori, the pollution in different areas and preventive strategies should be carried out to control this infection. the prevalence rate of helicobacter pylori infections in iran showed only little changes during the years 1994 to 2011. results: among the 30 studies evaluated, the prevalence rate of helicobacter pylori ...

background: acute appendicitis is one of the common and urgent illnesses among children.  children usually are unable to help the physicians completely due to weakness in describing the medical history. moreover, acute appendicitis overlaps with conditions of other diseases in terms of symptoms and signs in the first hours of presentation. these conditions lead to unwanted biases as well as err...

to establish a comprehensive picture of the relationship between glutathione s-transferase omega 2 (gsto2; mim: 612314) gene n142d variant (rs. 156697) and breast cancer risk, the present meta-analysis was carried out. studies published up to july 2012 with information about gsto2 polymorphism and breast cancer risk were identified using several electronic databases. we identified 4 eligible st...

this study aimedat investigating the difference between male and female iranian upper-intermediate efl learners in terms of critical thinking, meta-cognitive awareness listening strategies, and selection of meta- cognitive listening strategies. to this end, one hundred and fifty language learners (including males and females with average age of 26.5) were selected through homogenised process to...

background & aim: a meta-analysis refers to the statistical synthesis of results from a series of studies and has been used to estimate pooled prevalence of human diseases. in this study, we review some statistical issues regarding the meta-analysis of the prevalence of human diseases such as statistical software and programs, transformations of prevalence rate, assessment of heterogeneity, and...

metallothionein (mt) manifests varying expression levels in carcinomas, and they may be considered as valuable cell cancerization biomarkers for diagnosis of patients with cancers. a meta-analysis was conducted to evaluate comprehensively the mt expression difference in various benign tumors and malignant tumors, which compared the high with low mt expression levels in patients of the available...

leviteracetam (lev) is a novel antiepileptic drug with improved tolerance and safety, while carbamazepine (cbz) represents classical antiepileptic drugs. so far, a systemic comparison of the efficacy and side effects of these two drugs is lacking. a literature review on the comparison of leviteracetam versus carbamazepine for patients with epilepsy was performed up to september 2013 using pubme...

introduction: enuresis is the second most common disorder among children after allergic disorders. according to the results of previous studies, different estimates of enuresis prevalence and its related factors have been reported. combining the results of these studies is valuable. this study aims to estimate the prevalence of enuresis and its related factors among iranian children.materials a...

conclusions cp is effective for inducing clinical response and maintenance of clinical remission in patients with moderate to severe cd with similar side-effect profile as the control arms. background tumor necrosis factor-α (tnf-α) antibodies are currently used in patients with moderate to severe crohn’s disease (cd) who are unresponsive to conventional therapies. certolizumab pegol (cp) is on...

obesity is one of the main public health problems which underlie many chronic illnesses and socioeconomic difficulties. according to the literature review, there are limited data on the prevalence of obesity in different parts of iran as well as its trend and prevalence among different age and gender groups. the aim of this study was to estimate the obesity prevalence in iran using meta-analysi...