Power calculations for a sample size of n=533 cases and 537 controls with α=0.05 and β=0.80 for a two sided test
| Prevalence of polymorphism* | Minimum detectable RR (susceptive) | Minimum detectable RR (protective) |
|---|---|---|
| *Individuals who have either one or two copies of the putative risk allele. | ||
| RR=relative risk. | ||
| 5% | 1.89 | 0.37 |
| 10% | 1.58 | 0.54 |
| 20% | 1.35 | 0.68 |
| 30% | 1.27 | 0.75 |
| 40% | 1.21 | 0.79 |
| 50% | 1.17 | 0.83 |