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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