Table 2.
Modelled and observed mortality (rates based on three year averages) from breast cancer per 100 000 in 1998 by age group: two alternative estimates
| Age group (years) | 1989 as baseline
|
Increased curvature of cohort rate ratios
|
|||||
|---|---|---|---|---|---|---|---|
| Observed 1989 | Observed 1998 | % Difference | Modelled | Observed | % Difference | ||
| 50-54 | 71.6 | 56.5 | −21.1 | 63.8 | 56.5 | −11.4 | |
| 55-59 | 94.3 | 68.6 | −27.2 | 82.2 | 68.6 | −16.5 | |
| 60-64 | 108.2 | 85.4 | −21.1 | 101.3 | 85.4 | −15.7 | |
| 65-69 | 125.9 | 96.1 | −23.7 | 122.9 | 96.1 | −21.8 | |
| 70-74 | 136.8 | 122.8 | −10.3 | (147.2)* | (122.8)* | (−16.6)* | |
| 75-79 | 159.3 | 151.1 | −5.1 | 175.1 | 151.1 | −13.7 | |
*
Numbers shown in brackets because age group 70-74 not used for estimation of effect of screening.