Table 1.
Distribution of socio-demographics in non-participants and participants, and association between socio-demographics and participation in CFAS I and CFAS II
| Characteristics | CFAS I |
CFAS II |
P value** | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Not interviewed, n = 1,710 (%) | Interviewed, n = 7,635 (%) | Adjusted OR (95% CI)a | P value | Not interviewed, n = 6,214 (%) | Interviewed, n = 7,796 (%) | Adjusted OR (95% CI)a | P value | ||
| Geographical area | |||||||||
| Cambridgeshire | 641 (19.8) | 2,601 (80.2) | 1 | 1,667 (39.5) | 2,558 (60.5) | 1 | |||
| Newcastle | 515 (17.0) | 2,522 (83.0) | 0.8 (0.7–0.9) | 0.01 | 2,277 (46.5) | 2,616 (53.5) | 1.3 (1.2–1.5) | <0.01 | <0.01 |
| Nottingham | 554 (18.1) | 2,512 (81.9) | 0.9 (0.8–1.0) | 2,270 (46.4) | 2,622 (53.6) | 1.3 (1.2–1.5) | |||
| Sex | |||||||||
| Men | 588 (16.2) | 3,045 (83.8) | 1 | 2,646 (42.6) | 3,550 (57.4) | 1 | |||
| Women | 1,122 (19.6) | 4,590 (80.4) | 1.3 (1.2–1.4) | <0.01 | 3,574 (45.7) | 4,246 (54.3) | 1.1 (1.1–1.2) | <0.01 | 0.057 |
| Age at sampling date | |||||||||
| <70 | 410 (19.3) | 1,713 (80.7) | 1 | 1,769 (43.5) | 2,301 (56.5) | 1 | 0.47 | ||
| 70–75 | 406 (17.8) | 1,879 (82.2) | 0.9 (0.8–1.1) | 0.21 | 1,497 (45.0) | 1,830 (55.0) | 1.1 (1.0–1.2) | ||
| 75–80 | 360 (17.6) | 1,689 (82.4) | 0.9 (0.8–1.0) | 1,287 (44.7) | 1,590 (55.3) | 1.1 (1.0–1.2) | 0.059 | ||
| 80–85 | 291 (17.4) | 1,382 (82.6) | 0.9 (0.7–1.0) | 966 (45.2) | 1,171 (54.8) | 1.1 (1.0–1.2) | |||
| 85+ | 243 (20.0) | 972 (80.0) | 1.0 (0.8–1.2) | 697 (43.5) | 904 (56.5) | 1.0 (0.9–1.1) | |||
| Townsend deprivation index | |||||||||
| Quintile 1 (least deprived) | 302 (15.9) | 1,601 (84.1) | 1 | 1,052 (37.3) | 1,767 (62.7) | 1 | |||
| Quintile 2 | 327 (17.3) | 1,559 (82.7) | 1.1 (0.9–1.3) | <0.01 | 1,122 (40.0) | 1,682 (60.0) | 1.1 (1.0–1.3) | <0.01 | <0.01 |
| Quintile 3 | 352 (18.6) | 1,537 (81.4) | 1.2 (1.0–1.4) | 1,232 (44.2) | 1,558 (55.8) | 1.3 (1.2–1.5) | |||
| Quintile 4 | 346 (18.7) | 1,506 (81.3) | 1.2 (1.0–1.5) | 1,295 (46.8) | 1,472 (53.2) | 1.5 (1.3–1.6) | |||
| Quintile 5 (most deprived) | 369 (20.7) | 1,410 (79.3) | 1.4 (1.2–1.6) | 1,496 (53.7) | 1,289 (46.3) | 2.0 (1.8–2.2) | |||
aAdjusted for other variables in the model.
**
Tests for interaction between characteristic and cohort (CFAS I/CFAS II).