[How Many Subjects Do I Need to Power My Study?]

Overview

Journal Medwave

Specialties General Medicine
Public Health

Date 2014 Oct 30

PMID 25354214

Citations 2

Authors

Sergio R Munoz Navarro

Affiliations

Soon will be listed here.

Abstract

The article presents a tool that helps answer the question How many subjects do I need to power my study? We show how to determine sample size in observational epidemiological studies and provide examples of application using the statistical package Epidat, which is a shareware program developed under the auspices of the Pan American Health Organization, the Galician Board of Health and the University CES of Colombia. Examples of calculation of sample size for prevalence studies (cross-sectional), case-control studies and cohort studies are given.

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