purpose: to determine the prevalence of uncorrected refractive errors and its determinants in tehran in 2002. methods: a total of 6497 citizens representing a cross-section of the population of tehran were sampled using a stratified random cluster sampling strategy. of these, 4565 (70.3%) subjects participated in the study and were transferred to a clinic for an extensive eye examination and in...

Background Substantial variation in antibiotic prescribing rates between general practices persists, but remains unexplained at national level. Aim To establish the degree of variation in antibiotic prescribing between practices in England and identify the characteristics of practices that prescribe higher volumes of antibiotics. Design of study Cross-sectional study. Setting 8057 general pract...

Advances in medicine and health policy have resulted in growing of older population, with a concurrent rise in multimorbidity, particularly in Iran, as a country transitioning to a western lifestyle, and in which the percent of the population over the age of 60 years is increasing. This study aims to assess multimorbidity and the associated risk factors in Iran. We used data from 50,045 partici...

aims: considering the medical significance of cockroaches as insect vectors of food toxicities, and triggering allergy in respiratory system and skin, this survey was conducted to study the frequency of infestation and their effective factors in shahin shahr, iran. materials & methods: this cross-sectional descriptive study was carried out in 2010 in shahin shahr, isfahan, iran. data gathering ...

on the basis of a cross-sectional demographic survey that was conducted among the qashqai tribe of southern iran in 1973, the crude birth rate was estimated at 48.2 per thousand per year. the most productive age groups, was 25-29 years. forty-nine, point seven per cent (49.7%) or about one half of the total births occurred among married women aged 20 to 29 years eighty-seven point three per cen...

background: although there are efforts being underway to control and prevent intestinal parasitic infections (ipis) in ethiopia, they are still endemic and responsible for significant morbidity. the aim of this study was to evaluate the prevalence of ipis and their association with nutritional status among primary school children of delo-mena district, south eastern ethiopia. methods: a cross-s...

introduction: infertility is a major problem in today´s medicine. infertility is known a health indicator and the right to infertility treatment is part of millennium development goal. the present study aimed to determine the risk factors of infertility, in women referred to both public and private health centers in ilam. materials and methods: a cross-sectional study was carried out among wome...

a study was done about non-participation during phase iii of the international study of asthma and allergy in childhood (isaac iii) in valencia to determine whether the non-response rate significantly affected the results obtained in valencia. of the schools selected to participate in isaac iii, 13.3% denied not to, the main reason being they were already participated in a similar study. the is...

background : visual impairment is a very important public health problem. in iran, reports of visual impairment and blindness have been published from the urban population while the prevalence of visual impairment in the rural popu-lation has not been reported. the purpose of this study to determine the prevalence and causes of visual impairment, in a rural population in district of based on ag...

purpose : to study the age and gender specific history of ocular trauma in the population of tehran methods : using a stratified cluster sampling approach, 6,497 residents of tehran were selected. participants were transferred to an eye clinic to have complete eye examinations. during the interview, participants were asked about any history of ocular trauma, and any treatment or hospitalization...