Transcription of Sample size calculation in epidemiological studies
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Sample size calculation in epidemiological studies
Gerontologija 2006; 7(4): 225 231 GERONTOLOGIJAT heory and practiceSample size calculation in epidemiological studiesV. Kasiulevi ius1, V. apoka1, R. Filipavi i t 21 Vilnius University 2 Institute of Experimental and Clinical Medicine at Vilnius UniversitySummarySample- size determination is often an important step in planning an epidemiological study. There are several approaches to determining Sample size . It depends on the type of the study. Descriptive, observational and randomized controlled studies have different formulas to calculate Sample size . In this article, we discuss the formulas that can help to estimate Sample size in an epidemiological trial. We present a few examples from clinical practice, which may contribute to the understanding of this : Sample size determinationDetermining an appropriate Sample size for a clinical trial is an essential step in the statistical design of the pro-ject.
Sample size calculation in epidemiological studies 227 where N is the size of the population and n is the size of the sample. If fpc is close to 1, then there is almost no ef-
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