Risk ratio | Power (%) | Sample size (total) |
---|
0.6 | 80 | 16,556 |
0.7 | 80 | 30,716 |
0.8 | 80 | 71,988 |
0.6 | 90 | 40,676 |
0.7 | 90 | 41,294 |
0.8 | 90 | 95,702 |
- Sample size calculations for detection of reductions in preventable adverse event rates in a simple comparison of two equally sized groups of patients – assumes a two-tailed alpha of 0.05 (without continuity correction) and a control probability of 1%. Results from STATA v12.0.