Table 2 Weighting schemes for Cox's partial likelihood. Y i (t) denotes the at risk indicator for subject i at time t. Weighting method ISSP refers to the inverse subcohort sampling probability weighting as defined in (5).
From: Case-cohort design in practice – experiences from the MORGAM Project
| Prentice | Barlow (1994) | Barlow (1999) | Kalbfleisch & Lawless | ISSP | |
|---|---|---|---|---|---|
| noncase in subcohort | 1 |
|
|
|
|
| case in subcohort before event | 1 |
|
| 1 |
|
| case in subcohort at event | 1 | 1 | 1 | 1 | 1 |
| case outside subcohort before event | 0 | 0 | 0 | 1 | 0 |
| case outside subcohort at event | 1 | 1 | 1 | 1 | 1 |