Title of article
Sample Size Calculation for Epidemiologic Studies: Principles and Methods
Author/Authors
Kamangar, Farin tehran university of medical sciences tums - Digestive Disease Research Center, تهران, ايران , Kamangar, Farin Morgan State University - School of Community Health and Policy, USA , Islami, Farhad Mount Sinai School of Medicine - Institute for Translational Epidemiology, USA , Islami, Farhad tehran university of medical sciences tums - Digestive Disease Research Center, تهران, ايران
From page
295
To page
300
Abstract
This paper discusses the statistical principles, methods, and software programs used to calculate sample size. In addition, it reviews the practical challenges faced in calculating sample size. We show that because of such challenges, statistical calculations often do not provide us with a clear-cut number for the study sample size; rather they suggest a range of reasonable numbers. The paper also discusses several important nonstatistical considerations in determination ofsample size, such as novelty ofthe study and availability ofresources.
Keywords
Power , sample size , type I error , type II error
Journal title
Archives of Iranian Medicine
Journal title
Archives of Iranian Medicine
Record number
2545200
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