نتایج جستجو برای: tlgs
تعداد نتایج: 208 فیلتر نتایج به سال:
Logic regression is a generalized regression and classification method that is able to make Boolean combinations as new predictive variables from the original binary variables. Logic regression was introduced for case control or cohort study with independent observations. Although in various studies, correlated observations occur due to different reasons, logic regression have not been studi...
Regression is one of the most important statistical tools in data analysis and study of the relationship between predictive variables and the response variable. in most issues, regression models and decision tress only can show the main effects of predictor variables on the response and considering interactions between variables does not exceed of two way and ultimately three-way, due to co...
Background : when occurred during adolescence, adolescents in district 13 in Tehran as a part of Tehran Lipid and Glucose Study (TLGS) . Materials and methods : randomly selected. A demographic questionnaire as well as General Health Questionnaire (GHQ-28) which had already been validated for the Iranian population, were gathered by face-to-face interview. We have considered score of 6 as cut...
Misclassification of disease status and risk factors is one of the main sources of error in studies. Wrong assignment of individuals into exposed and non-exposed groups may seriously distort the results in case-control studies. This study investigates the effect of misclassification error on odds ratio estimates and attempts to introduce a correction method. Data on 3332 men aged 30-69 years fr...
Risk assessment is an important issue for starting medication for patients. Literature reveals that diabetes, hypertension, dyslipidemia and Body Mass Index (BMI) are among major risk factors for longevity. Since the cut-off points proposed in various sources are generally irrespective of age, sex and race, it has been attempted to validate current definitions for Tehran's elderly population by...
OBJECTIVE The current study was undertaken for use of the decision tree (DT) method for development of different prediction models for incidence of type 2 diabetes (T2D) and for exploring interactions between predictor variables in those models. DESIGN Prospective cohort study. SETTING Tehran Lipid and Glucose Study (TLGS). METHODS A total of 6647 participants (43.4% men) aged >20 years, ...
مقدمه: امروزه چاقی یکی از مشکلات مهم بشری به شمار می‌رود و تداوم آن در بروز بیماری‌های قلبی ـ عروقی و دیابت موثر است، اما ایده‌ی وجود منشای ویروسی برای آن در مقایسه با دلایل ژنتیکی و سایر عوامل محیطی کمتر مورد مطالعه قرار گرفته است. بنابراین، هدف مطالعه‌ی حاضر بررسی میزان شیوع Adv36 و ارتباط آن با فاکتورهای چاقی و لیپیدهای سرمی در جمعیت قند و لیپید تهران بود. مواد و روش‌ها: در مطالعه‌ی مقطعی حا...
مقدمه: در چارچوب مطالعه قند و لیپید تهران (TLGS) به بررسی میزان پاسخ‌دهی افراد دعوت شده در این مطالعه پرداخته شد و تفاوت بین گروه‌های شرکت‌کننده و امتناع‌کننده از شرکت در این مطالعه بررسی گردید. مواد و روش‌ها: در یک مطالعه مورد ـ شاهدی در بخش مقطعی مطالعه قند و لیپید تهران، پرسشنامه طرح به صورت مصاحبه حضوری با افراد 20 سال به بالای مرد و زن امتناع‌کننده از شرکت در مطالعه قند و لیپید تهران (گروه...
Background: World Health Organization (WHO) defines three goals to assess the performance of a health system: the state of health, fairness in financial contribution and responsiveness. We assessed the responsiveness of health system for patients with diabetes in a defined population cohort in Tehran, Iran. Methods: Total responsiveness and eight domains (prompt attention, dignity, communica...
Background & Objectives: Although the population of elderly is increasing in Iran, few studies carried out on this group. The aim of this study was to identify life expectancy and contributory risk factors for the Tehranian elderly of ages above 60 years. Methods: Individuals above 60 years old whom were recruited in the primary phase of the Tehran Lipid and Glucose Study (TLGS) during 1998-20...
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