نتایج جستجو برای: cohort effect
تعداد نتایج: 1835023 فیلتر نتایج به سال:
purpose : to investigate tear film status after phacoemulsification surgery with temporal and supratemporal clear corneal incision in a cohort of patients with senile cataract methods : we enrolled sixty eight eyes of 68 patients with senile cataract requiring phacoemulsification in a prospective, cohort study. all patients undergone basic tear secretion test (btst), tear meniscus height (tmh),...
OBJECTIVES Previous studies indicate a high burden of diarrhoeal disease in Vietnamese children, however longitudinal community-based data on burden and aetiology are limited. The findings from a large, prospective cohort study of diarrhoeal disease in infants in southern Vietnam are presented herein. METHODS Infants were enrolled at birth in urban Ho Chi Minh City and a semi-rural district i...
background : the association of the mobile phone use and risk of brain tumor remains controversial among radiationepidemiologists. methods : we hypothesized if an association between brain tumor and mobile phone use exists, this association will be manifested as a cohort effect (as a proxy of association between mobile phone use and brain tumor) in the incidence rates of brain tumor during the ...
conclusions the effect of diabetes mellitus on stroke was more significant than on ihd, and the effect of high ldl-c level was more significant on ihd than on stroke, other risk factors, including hypertension, have similar rrs for ihd and stroke. health care professionals need more training regarding the rrs of these risk factors in the iranian society, and health decision makers should consid...
background in the golestan cohort study that was launched to investigate the causes of esophageal cancer, a complete biospecimen bank was established for storage of collected blood, urine, hair, and nail samples. the objective of this study was to evaluate the feasibility of nail samples as a biomarker of selected trace elements status. methods thirty toenail samples were selected randomly from...
Background and purpose: Cohort studies are one of the best types of observational studies in investigating the causal relationship, diseases etiology, and determining the incidence and natural history of diseases. In recent decades cohort studies played a major role in identification of environmental, cardiovascular and cancers risk factors. Considering the important role of cohort studies in p...
Gender differences in educational outcomes were examined in a birth cohort of over 1,000 Christchurch born children studied from the point of school entry to the age of 18. This analysis suggested three major conclusions: i) Throughout the school career of this cohort males achieved less well than females. Gender differences were evident in the results of standardised testing, teacher ratings o...
BACKGROUND Childhood socio-economic position (SEP) is associated with adult smoking status. Previous studies have investigated mediation by educational attainment. The aim of this study is to examine whether childhood psychosocial factors (cognitive ability, psychosocial adjustment and parental involvement) are important in the association between childhood SEP and adult smoking status over and...
OBJECTIVES Promoting unstructured outside play is a promising vehicle to increase children's physical activity (PA). This study investigates if factors of the social environment moderate the relationship between the perceived physical environment and outside play. STUDY DESIGN 1875 parents from the KOALA Birth Cohort Study reported on their child's outside play around age five years, and 1516...
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