Table 3.
Numbers and incidence rate of advanced stage breast cancer (UICC II+] in the period after the initial screening (interval ABC plus ABC detected at first subsequent screening] and in the period after the first subsequent screening (interval ABC plus ABC detected at the second subsequent screening], compared with the reference ABC incidence rate and expressed as a relative reduction (in %). Regular participants of the mammography screening program in North Rhine-Westphalia, 2005 to 2013
| UICC II + interval cancers | UICC II + breast cancers detected at screening | Total rate of UICC II+ cancers | Reference incidence rate of UICC II+ cancers | Relative reductionb | |||
|---|---|---|---|---|---|---|---|
| n | 24-months rate /100,000a [95% CI] | n | 24-months rate /100,000a [95% CI] | 24-months rate /100,000a [95% CI] | 24-months rate /100,000a [95% CI] | (%) | |
| First period after the initial screening | 1708 | 143.5 [136.7; 150.3] | 762 | 148.1 [137.5; 158.8] | 291.6 [279.0; 304.2] | 349.4 [319.4; 379.6] | 16.5 [9.8; 22.8] |
| Second period after the first subsequent screening | 643 | 127.7 [117.7; 137.7] | 323 | 147.3 [129.7; 165.0] | 275.0 [254.7; 295.3] | 349.4 [319.4; 379.6] | 21.3 [13.5; 28.4] |
aage - standardized to the distribution of the 5-years age groups in the initial prevalence screening, 95% CI: 95% confidence interval
bFormula see methods section