Exclusions for circulatory disease incidence outcomes
| Circulatory disease incidence | Answered second survey (1994–1998) | Third survey (2003–2005) missing N (%) | Outcome before second survey, 1994–1998 (pre-existing condition) N (%) | Outcome missing status* N (%) | Outcome missing date N (%) | Final number in incidence analysis cohort |
|---|---|---|---|---|---|---|
| Stroke | 90 957 | 23 701 (26) | 468 (1) | 3992 (4) | 68 (0.1) | 62 728 |
| Myocardial infarction | 90 957 | 23 701 (26) | 915 (1) | 3995 (4) | 72 (0.1) | 62 274 |
| Hypertension† | 90 957 | 33 746 (37) | 9955 (11) | 3893 (4) | 575 (0.6) | 42 788 |
*“Outcome missing status” means that we do not know whether the participant had the specific outcome. ‘Outcome missing date’ means that the individual had the specific outcome, but the date was unknown.
†Since there were three different versions of the third questionnaire, and hypertension was not collected on all of them, we could not ascertain hypertension history for some participants. These participants were considered not to have answered the third question.