Stratum | Exposure | ||
E=0 | E=1 | E=2 | |
S=0 | |||
log-mean | μ0 | μ0+βE | μ0+2 βE |
OR | 1 (ref.) | OR10 | OR20 |
S=1 | |||
log-mean | μ0+βS | μ0+βS+βE | μ0+βS+2βE |
OR | 1 (ref.) | OR11 | OR21 |
Interaction | 1 (ref.) | IA1=OR11/OR10 | IA2=OR21/OR20 |
In each cell, the outcome is assumed to be log-normally distributed with the log-mean indicated and a constant log-SD (σ).