Potential predictors of attrition variables | When obtained from self-completed questionnaires | Response rate |
---|---|---|
Age (years) | Phase 1 (1985–1988) | 10,308 |
Gender | Phase 1 ( 1985-1988 | 10,308 |
Marital status (Married/not married) | Phase 1 ( 1985-1988 | 10,308 |
Occupational grade (3 levels) | Phase 1 ( 1985-1988 | 10,308 |
Educational achievement (5 levels) | Phase 5 (1997–1999) | 7,870 |
Retirement | At various phases | |
Housing (owned/rented) | Phase 1 ( 1985-1988 | 10,308 |
Number of social activities | Phase 5 (1997–1999) | 7,870 |
SF 36 (mental health & physical function) | Phase 5 (1997–1999) | 7,870 |
Longstanding illness (self-reported yes/no) | Phase 1 ( 1985–1988) only asked of 6339 participants | 10,308 |