Trends in rates of screen detected ductal carcinoma in situ (DCIS) and invasive breast cancer in the 1992–2006 period by 5-year age groups.

aP-value for the existence of a change point in trend obtained from the Poisson transition change-point model adjusted by screening region. Analyses performed for each 5-year age group and for the overall.
bAnnual percentage change and 95% confidence intervals (95%CI) obtained from the Poisson regression model adjusted by screening region and participation status (first or subsequent screen). Analyses performed for each 5-year age group and for the overall.
cSignificant trend at the 95% CI.