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. 2024 Jul 5;14(7):e084737. doi: 10.1136/bmjopen-2024-084737

Table 2.

Minimum detectable risk ratio with an overall sample size of n=4822, 80% power and probability of a type 1 error at 5%

Prevalence of outcome
10% 20% 30% 40%
Proportion of control sample exposed 0.1 1.43 1.32 1.28 1.26
0.2 1.28 1.21 1.18 1.17
0.3 1.21 1.16 1.14 1.13
0.4 1.17 1.12 1.11 1.10
0.5 1.13 1.10 1.09 1.08