Phase | 5 | 7 | 9 |
---|---|---|---|
Smoking status, n (%) | |||
 Non-smoker | 4940 (49.4) | 4940 (49.4) | 4940 (49.4) |
 Ex-smoker | 4343 (43.4) | 4436 (44.4) | 4557 (45.6) |
 Current smoker | 717 (7.2) | 624 (6.2) | 503 (5.0) |
Age Category (year), n (%) | |||
 < 50 | 2420 (24.2) |  |  |
 50 and < 55 | 2967 (29.7) |  |  |
 55 and < 60 | 2010 (20.1) |  |  |
 60 and < 65 | 1896 (19.0) |  |  |
 65 | 707 (7.1) |  |  |
Employment Grade, n (%) | |||
 High | 5812 (58.1) |  |  |
 Intermediate | 3878 (38.8) |  |  |
 Low | 310 (3.1) |  |  |
Education, n (%) | |||
 None | 555 (5.6) |  |  |
 School | 4675 (46.8) |  |  |
 University | 4770 (47.7) |  |  |
Standardised cognitive function (SD), mean (SD) | |||
 Global | 0.00 (0.78) | −0.22 (0.78) | − 0.42 (0.79) |
 Memory | 0.05 (0.71) | − 0.10 (0.71) | − 0.26 (0.72) |
Participation status, n (%) | |||
 Response | 8709 (87.1) | 7850 (78.5) | 7549 (75.5) |
 Died | 0 | 240 (2.4) | 560 (5.6) |
 Non-response | 1291 (12.9) | 1485 (14.9) | 1289 (12.9) |
 Attrition | 0 | 425 (4.3) | 602 (6.0) |