doi: 10.1097/EDE.0000000000000876.
Planning Study Size Based on Precision Rather Than Power
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- PMID: 29912015
- DOI: 10.1097/EDE.0000000000000876
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Planning Study Size Based on Precision Rather Than Power
Epidemiology.
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Erratum in
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Erratum: Planning Study Size Based on Precision Rather Than Power.Epidemiology. 2019 Jan;30(1):e1. doi: 10.1097/EDE.0000000000000924. Epidemiology. 2019. PMID: 30499864 No abstract available.
Abstract
Study size has typically been planned based on statistical power and therefore has been heavily influenced by the philosophy of statistical hypothesis testing. A worthwhile alternative is to plan study size based on precision, for example by aiming to obtain a desired width of a confidence interval for the targeted effect. This article presents formulas for planning the size of an epidemiologic study based on the desired precision of the basic epidemiologic effect measures.
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