S.J. Muncer
Power dressing and meta-analysis: Incorporating power analysis into meta-analysis
Muncer, S.J.; Taylor, S.; Craigie, M.
Authors
S. Taylor
M. Craigie
Abstract
Aims. This paper highlights the lack of consideration that is given to power in the health and social sciences, which is a continuing problem with both single study research and more importantly for meta-analysis. Background. The power of a study is the probability that it will lead to a statistically significant result. By ignoring power the single study researcher makes it difficult to get negative results published and therefore affects meta-analysis through publication bias. Researchers using meta-analysis, who also ignore power, then compound the problem by including studies with low power that are more likely to show significant effects. Method. A simple means of calculating an easily understood measure of effect size from a contingency table is demonstrated in this paper. A computer programme for determining the power of a study is recommended and a method of reflecting the adequacy of the power of the studies in a meta-analysis is suggested. An example of this calculation from a meta-analytic study on intravenous magnesium, which produced inaccurate results, is provided. Conclusion. It is demonstrated that incorporating power analysis into this meta-analysis would have prevented misleading conclusions being reached. Some suggestions are made for changes in the protocol of meta-analytic studies, which highlight the importance of power analysis.
Citation
Muncer, S., Taylor, S., & Craigie, M. (2002). Power dressing and meta-analysis: Incorporating power analysis into meta-analysis. Journal of Advanced Nursing, 38(3), 274-280. https://doi.org/10.1046/j.1365-2648.2002.02177.x
Journal Article Type | Article |
---|---|
Publication Date | 2002-05 |
Deposit Date | Mar 29, 2007 |
Journal | Journal of Advanced Nursing |
Print ISSN | 0309-2402 |
Electronic ISSN | 1365-2648 |
Publisher | Wiley |
Peer Reviewed | Peer Reviewed |
Volume | 38 |
Issue | 3 |
Pages | 274-280 |
DOI | https://doi.org/10.1046/j.1365-2648.2002.02177.x |
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