Sample size: How many is enough?

Burmeister, E. & Aitken, L. M. (2012). Sample size: How many is enough?. Australian Critical Care, 25(4), pp. 271-274. doi: 10.1016/j.aucc.2012.07.002

[img]
Preview
Text - Accepted Version
Available under License : See the attached licence file.

Download (121kB) | Preview
[img]
Preview
Text (Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence) - Other
Download (201kB) | Preview

Abstract

Sample size is an element of research design that significantly affects the validity and clinical relevance of the findings identified in research studies. Factors that influence sample size include the effect size, or difference expected between groups or time points, the homogeneity of the study participants, the risk of error that investigators consider acceptable and the rate of participant attrition expected during the study. Appropriate planning in regard to each of these elements optimises the likelihood of finding an important result that is both clinically and statistically meaningful.

Item Type: Article
Additional Information: © 2012, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords: Sample size
Subjects: R Medicine > RA Public aspects of medicine
Divisions: School of Health Sciences
URI: http://openaccess.city.ac.uk/id/eprint/13802

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics