Table 2

The minimum OR detectable according to proportion of controls exposed to a particular drug type, using a power of 80% and a significance level of 0.05

Proportion of exposed controls (%)ORNumber of casesNumber of controlsTotal study population
51.118 902189 020207 922
51.2490449 04053 944
51.3225722 57024 827
101.110 041100 410110 451
101.2262226 22028 842
101.3121412 14013 354
201.1572257 22062 942
201.2151315 13016 643
201.370970907799