Incidence of advanced-stage breast cancer in regular participants of a mammography screening program: a prospective register-based study

Table 2 Numbers and incidence rates of all 24-months interval breast cancers (in-situ plus invasive) after the initial prevalence and the first subsequent incidence screening of the mammography screening program North Rhine-Westphalia, 2005 to 2013

	Number of screened women with negative screening	Number of interval cancers	Interval cancer Incidence rate per 100,000^a [95% CI]
After initial screening	1,190,267	2859	240.2 [231.4; 249.0]
After first subsequent screening	495,258	1082	215.3 [202.3; 228.3]

^aage - standardized to the distribution of the 5-years age groups in the initial screening, 95% CI: 95% confidence interval

ISSN: 1471-2407