Table 4 Predictors for each type of loss to follow-up from the multivariable model.
From: Attrition and bias in the MRC cognitive function and ageing study: an epidemiological investigation
| Â | Â | Dead | Refused | Moved | |||
|---|---|---|---|---|---|---|---|
Factor |  | OR†| 95% CI‡ | OR†| 95% CI‡ | OR†| 95% CI‡ |
Age | 65–74 | 1.0 | - | 1.0 | - | 1.0 | - |
|  | 75–79 | 1.7 | (1.4 – 2.2) | 1.1 | (1.0 – 1.2) | 1.0 | (0.7 – 1.5) |
|  | 80–84 | 2.3 | (1.9 – 2.9) | 0.8 | (0.7 – 1.0) | 1.0 | (0.6 – 1.5) |
|  | 85–89 | 3.0 | (2.4 – 3.8) | 0.9 | (0.7 – 1.0) | 1.1 | (0.6 – 1.7) |
|  | 90+ | 4.5 | (3.5 – 5.7) | 0.8 | (0.6 – 0.9) | 1.8 | (1.1 – 3.1) |
MMSE | <18 | 4.4 | (3.5 – 5.7) | 4.3 | (3.3 – 6.6) | 1.0 | - |
|  | 18–21 | 2.9 | (2.3 – 3.5) | 4.3 | (3.6 – 5.1) |  |  |
|  | 22–25 | 1.7 | (1.4 – 1.9) | 2.4 | (2.1 – 2.7) |  |  |
|  | 26–30 | 1.0 | - | 1.0 | - |  |  |
|  | Missing | 6.0 | (4.1 – 8.7) | 9.1 | (6.0 – 13.6) | 3.3 | (1.0 – 11.1) |
ADL score | 0–10 | 1.0 | - | Not included | Not included | ||
|  | 11–18 | 2.2 | (1.9 – 2.6) |  |  |  |  |
|  | Missing | 2.4 | (1.4 – 4.0) |  |  |  |  |
Men | Excl.SR Health* | 1.6 | (1.4 – 2.0) | Not included | Not included | ||
|  | Poor SR Health§ | 3.6 | (3.0 – 4.4) |  |  |  |  |
|  | Missing SRH | 3.1 | (1.7 – 5.6) |  |  |  |  |
Women | Excl.SR Health* | 1.0 | (0.8 – 1.2) |  |  |  |  |
|  | Poor SR Health§ | 1.7 | (1.4 – 2.0) |  |  |  |  |
|  | Missing SRH | 2.4 | (1.3 – 4.3) |  |  |  |  |
Smoking | No | 0.7 | (0.6 – 0.9) | Not included | 1.0 | - | |
|  | Yes | 1.0 | - |  |  | 1.7 | (1.1 – 2.7) |
|  | Missing | 0.6 | (0.3 – 1.1) |  |  |  | None |
Centre | Cambridge | Not included | 1.4 | (1.3 – 1.6) | Not included | ||
|  | Gwynedd |  |  | 1.7 | (1.5 – 1.8) |  |  |
|  | Newcastle |  |  | 1.3 | (1.2 – 1.5) |  |  |
|  | Nottingham |  |  | 1.1 | (1.0 – 1.3) |  |  |
|  | Oxford |  |  | 1.0 | (0.9 – 1.1) |  |  |
>9 years of education |  | Not included | 0.8 | (0.7 – 0.9) | Not included |  | |
Living alone |  | Not included | 0.8 | (0.7 – 0.9) | Not included | ||
Living family / friends | Â | Â | Â | 1.0 | - | Â | Â |
Residential home |  | Not included | 0.5 | (0.3 – 0.6) | 0.9 | (0.4 – 2.2) | |
Own home | Â | Not included | Not included | 1.0 | - | ||
Warden controlled |  |  |  |  |  | 0.4 | (0.2 – 0.9) |
Self reported depression |  | Not included | Not included | 1.7 | (1.1 – 2.7) | ||
Never married / cohabited |  | Not included | Not included | 1.7 | (1.2 – 2.5) | ||
Screening AGECAT O3+ |  | Not included | Not included | 2.0 | (1.0 – 4.0) | ||