Located | Crude odds ratio | Adjusted* odds ratio | ||||
---|---|---|---|---|---|---|
(n = 181) | OR | (95% CI) | OR | (95% CI) | ||
n | (%) | |||||
Age group (years) | ||||||
65–69 | 37 | (55.2) | 1.95 | (1.09–3.50) | 1.73 | (0.93–3.22) |
70–79 | 87 | (55.1) | 1.94 | (1.23–3.05) | 2.13 | (1.31–3.46) |
80–89 | 57 | (38.8) | 1.00 | (referent) | 1.00 | (referent) |
Region (population density)† | ||||||
Low | 91 | (54.8) | 1.00 | (referent) | 1.00 | (referent) |
High | 90 | (43.7) | 0.64 | (0.42–0.97) | 0.55 | (0.35–0.86) |
2001 web-search‡ | ||||||
Yes | 70 | (56.5) | 1.60 | (1.04–2.47) | 1.82 | (1.14–2.90) |
No | 111 | (44.8) | 1.00 | (referent) | 1.00 | (referent) |
Study address status§ | ||||||
No change | 41 | (60.3) | 1.00 | (referent) | 1.00 | (referent) |
New address | 10 | (58.8) | 0.64 | (0.25–1.69) | 1.00 | (0.33–3.02) |
Possible address | 66 | (61.1) | 0.93 | (0.49–1.77) | 1.09 | (0.57–2.07) |
Unable to determine | 64 | (35.8) | 0.33 | (0.18–0.60) | 0.34 | (0.19–0.61) |
Reason required tracing | ||||||
Returned mail | 128 | (50.0) | 1.00 | (referent) | ||
Incorrect number | 53 | (45.7) | 1.19 | (0.77–1.85) |