Mulivariate analysis with adjustment for follow up year | Multivariate main effects model | |||||
---|---|---|---|---|---|---|
Variable | RH | 95% CI | RH | 95% CI | ||
Catchment area category | ||||||
Regional | 1.00 | Reference | 1.00 | Reference | ||
County | 1.04 | 0.93 to 1.15 | 1.03 | 0.97 to 1.10 | ||
Large local | 1.07 | 0.95 to 1.21 | 1.06 | 0.99 to 1.14 | ||
Small local | 1.15 | 1.03 to 1.29 | 1.15 | 1.07 to 1.22 | ||
Period of diagnosis | ||||||
1973–76 | 1.00 | Reference | 1.00 | Reference | ||
1977–80 | 0.88 | 0.80 to 0.98 | 0.88 | 0.82 to 0.94 | ||
1981–84 | 0.80 | 0.72 to 0.89 | 0.79 | 0.73 to 0.84 | ||
1985–88 | 0.74 | 0.67 to 0.82 | 0.73 | 0.68 to 0.78 | ||
1989–92 | 0.69 | 0.61 to 0.77 | 0.67 | 0.62 to 0.72 | ||
Age at diagnosis (y) | ||||||
⩽69 | 1.00 | Reference | 1.00 | Reference | ||
⩾70 | 1.39 | 1.31 to 1.47 | 1.41 | 1.35 to 1.48 | ||
Follow up year | ||||||
1 | 1.00 | Reference | 1.00 | Reference | ||
2 | 0.65 | 0.59 to 0.71 | 0.65 | 0.62 to 0.69 | ||
3 | 0.48 | 0.43 to 0.55 | 0.49 | 0.46 to 0.53 | ||
4 | 0.34 | 0.28 to 0.39 | 0.34 | 0.31 to 0.38 | ||
5 | 0.27 | 0.22 to 0.33 | 0.28 | 0.25 to 0.31 |