Table 1.
Characteristics of participants in each simulated dataset
| 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) |