sample size calculation in medical studies
نویسندگان
چکیده
optimum sample size is an essential component of any research. the main purpose of the sample size calculation is to determine the enough number of units needed to detect the unknown clinical parameters or the treatment effects or the association after data gathering. it is not uncommon for studies to be underpowered and failing to detect the existed treatment effects due to inadequate sample size. in this paper, we explain briefly the basic principles of sample size calculations in medical studies.
منابع مشابه
Sample size calculation in medical studies
Optimum sample size is an essential component of any research. The main purpose of the sample size calculation is to determine the number of samples needed to detect significant changes in clinical parameters, treatment effects or associations after data gathering. It is not uncommon for studies to be underpowered and thereby fail to detect the existing treatment effects due to inadequate sampl...
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عنوان ژورنال:
gastroenterology and hepatology from bed to benchجلد ۶، شماره ۱، صفحات ۲۰۱۳-۶
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