From: Power for tests of interaction: effect of raising the Type I error rate
 | Small Study Size (75 Cases & 150 Controls) | Large Study Size (300 cases & 600 controls) | Very Large Study Size (1200 Cases & 2400 Controls) | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Type of Interaction | Type I Error Rate | Type I Error Rate | Type I Error Rate | ||||||||||
 | 5% | 10% | 15% | 20% | 5% | 10% | 15% | 20% | 5% | 10% | 15% | 20% | |
S1 | Sub-additive | 43% | 55% | 63% | 69% | 95% | 97% | 98% | 99% | >99% | >99% | >99% | >99% |
A1 | Additive | 21% | 31% | 39% | 45% | 63% | 74% | 80% | 84% | >99% | >99% | >99% | >99% |
A2 | Additive | 26% | 37% | 45% | 52% | 75% | 84% | 88% | 91% | >99% | >99% | >99% | >99% |
A3 | Additive | 24% | 35% | 43% | 49% | 71% | 81% | 86% | 89% | >99% | >99% | >99% | >99% |
I1 | Intermediate | 18% | 28% | 35% | 42% | 55% | 67% | 75% | 79% | 99% | 99% | >99% | >99% |
I2 | Intermediate | 11% | 18% | 24% | 30% | 28% | 40% | 48% | 54% | 79% | 87% | 91% | 93% |
M1 | Multiplicative | 5% | 10% | 15% | 20% | 5% | 10% | 15% | 20% | 5% | 10% | 15% | 20% |
T1 | Super-multiplicative | 7% | 13% | 19% | 24% | 14% | 22% | 29% | 35% | 40% | 53% | 61% | 67% |
T2 | Super-multiplicative | 16% | 25% | 32% | 38% | 47% | 60% | 67% | 73% | 96% | 98% | 99% | 99% |
T3 | Super-multiplicative | 30% | 42% | 50% | 57% | 82% | 89% | 93% | 95% | >99% | >99% | >99% | >99% |