نتایج جستجو برای: risk ratio
تعداد نتایج: 1349368 فیلتر نتایج به سال:
Background: Pre-diabetes is a high risk condition for developing type 2 diabetes mellitus and cardiovascular disease. The target of this study is evaluation of incidence rate of pre-diabetes and its risk factors in a long- term follow up in the Tehran Lipid and Glucose Study. Methods: The Tehran Lipid and Glucose Study is a prospective study being accomplished on a characteristic sample of t...
oesophageal cancer is one of the most fatal cancer in human in spite of high incidence in the north of Iran and poor prognosis,there is not information regarding prognostic factors in this area.this study was conducted to determine prognodtic factors of the survival of patients with oesophageal cancer under radiotherapy.We conducted a descriptive-analytical study using historical cohort that ha...
Background and Aims: workers in petrochemical industries are exposed to various contaminants and are facing to serious hazards, therefore a comprehensive risk assessment program for identification of hazardous chemicals that affect human health and also determination of hazardous tasks and processes is necessary. Methods : This descriptive cross-sectional study was conducted in three stag...
INTRODUCTION An important objective of epidemiological research is to identify risk factors for disease. Depending on the particular question being asked, cohort studies, case-control studies, or cross-sectional studies are conducted. METHODS Methods of data analysis in different types of epidemiological studies are illustrated through examples with fictive data. Important measures of frequen...
Background: Although numerous observational studies have investigated the association between gender and risk of congenital hypothyroidism, the role of gender as a risk factor for congenital hypothyroidism remains unknown.Thismeta-analysis was conducted to summarize the epidemiologic evidence of the effect of gender on the congenital hypothyroidism occurrence, and also to identify the sex ratio...
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