نتایج جستجو برای: nested case control
تعداد نتایج: 2563817 فیلتر نتایج به سال:
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 ...
Researchers subject to time and budget constraints may conduct small nested case-control studies with individually matched controls to help optimize statistical power. In this paper, we show how precision can be improved considerably by combining data from a small nested case-control study with data from a larger nested case-control study of a different outcome in the same or overlapping cohort...
the purpose of the present study is to find out whether bilinguals of khuzestan-arab origin or monolinguals of iranian origin code-switch during learning or speaking english and which group is more susceptible to code-switch. to this end, the students of 24 classes from high schools and pre- university centers were screened out, and interviewed and their voices and code-switchings were recorded...
Background Patient falls are considered a challenge to the patient’s safety in hospitals, which, in addition to increasing the length of stay and costs, may also result in severe injuries or even the death of the patient. This study aims to investigate the associations between risk factors among fallers in comparison with the control group. Methods A prospective nested...
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