From: On hazard ratio estimators by proportional hazards models in matched-pair cohort studies
| Type | Number of pairs | Observed data in the pair | Observed time | Y k1 | Y k0 |
|---|---|---|---|---|---|
| 10 | n 10 | Exposed gets event and unexposed censored simultaneously | X k1 = X k0 | 1 | 0 |
| 11 | n 11 | Unexposed gets event and exposed censored simultaneously | X k1 = X k0 | 0 | 1 |
| 12 | n 12 | Exposed and unexposed get events simultaneously | X k1 = X k0 | 1 | 1 |