Chapter

Planning Studies: Estimating Power and Sample Size

Ezra Susser, Sharon Schwartz, Alfredo Morabia and Evelyn J. Bromet

in Psychiatric Epidemiology

Published in print July 2006 | ISBN: 9780195101812
Published online September 2009 | e-ISBN: 9780199864096 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780195101812.003.24

Series: Oxford Psychiatry Series

Planning Studies: Estimating Power and Sample Size

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Human research studies can be very difficult to conduct, very time-consuming to complete, and extremely costly. They require tremendous commitment from the investigators involved, as well as from all of the participants who contribute their time, their effort, and even their blood and other physical samples to further the cause of research. Given these considerations, investigators need to quantify, before embarking on a study, their ability to detect meaningful associations under the proposed study design. This chapter describes some of the most basic and commonly used formulas for computing power and sample size.

Keywords: human research studies; computing power; sample size; associations

Chapter.  3078 words. 

Subjects: Public Health and Epidemiology

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