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Table 1 Subcohort selections for the example cohort: first selection: follow-up to the end of the year 2003, second selection: follow-up to the end of the year 2004. These case definitions used for CHD and stroke are specific for determining the subcohort size; the definitions used for defining the case-cohort set are usually wider.

From: Case-cohort design in practice – experiences from the MORGAM Project

  Men Women
  2003 2004 2003 2004
CHD cases 96 104 24 32
Stroke cases 58 70 26 32
Subcohort size 192 208 52 64