Table 10

Variation in power for repeated measures design given different level of correlation between measurements.

Size of correlations between variables

Sample size required for 80% power


0.0

125

0.2

101

0.5

65

0.8

29

-0.2

149


Miles BMC Medical Research Methodology 2003 3:27   doi:10.1186/1471-2288-3-27

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