Table 2 An illustration of non-collapsibility of the odds ratio
From: Planning a method for covariate adjustment in individually randomised trials: a practical guide
| Â | Stratum | |||||
|---|---|---|---|---|---|---|
| Â | A | B | Both | |||
Allocation | Dead | Alive | Dead | Alive | Dead | Alive |
Intervention | 9 | 1 | 5 | 5 | 14 | 6 |
Control | 5 | 5 | 1 | 9 | 6 | 14 |
Odds ratio | 9 | 9 | 5.4 | |||