From: Breast cancer incidence and overdiagnosis in Catalonia (Spain)
Cohort
Overdiagnosis (%)
[95% conf. interval]
1935
0.4
-8.8
12.2
1940
23.3
9.1
43.4
1945
30.6
12.7
57.6
1950
46.6
22.7
85.2