نتایج جستجو برای: matched case control studies
تعداد نتایج: 3744722 فیلتر نتایج به سال:
Matching is a methodology applied at the beginning of a study that compares two or more groups. The main advantage for matching over random non-matching sampling is that matched study designs can often lead to a more statistically efficient analysis. The most commonly used methods to analyse the matched pair dataset are logistic regression models. The main advantage of using logistic regression...
به منظور کارآیی داروی کلونیدین در درمان کودکان بیش فعال 6-17 ساله، تعداد 20 نفر از کودکانی که به درمانگاه اطفال بیمارستان روز به مراجعه کردند و تشخیص adhd برای آنها گذاشته شده بود، بطور random انتخاب شدند این 20 کودک بطور random به دو گروه 10 نفر تقسیم شدند در گروه case کودکان بیمار هفته اول متیل فندیت گرفتند و 3 هفته بعد نتیل فنیدیت و کلونیدین دریافت کردند و گروه control هفته فندیت گرفتند و 3 ...
Background: several studies have explored the relationship between blood lipid levels and depressive disorders. Specific studies reported an association between lower serum cholesterol and depressive disorder, while some other studies no connection. The aim of this study was to evaluate the relationship of serum lipid profiles and serum serotonin with depressive disorder. Methods: In the prese...
Background & Objective: Inability to measure exact exposure in epidemiological studies is a common problem in many studies, especially cross-sectional studies. Depending on the extent of misclassification, results may be affected. Existing methods for solving this problem require a lot of time and money and it is not practical for some of the exposures. Recently, new methods have been proposed ...
abstract the present study was conducted to investigate the effect of using model essays on the development of writing proficiency of iranian pre-intermediate efl learners. to fulfill the purpose of the study, 55 pre- intermediate learners of parsa language institute were chosen by means of administering proficiency test. based on the results of the pretest, two matched groups, one as the expe...
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