Overdiagnosis due to breast cancer screening: updated estimates of the Helsinki service study in Finland

摘要

Background: Overdiagnosis is the most important adverse event of breast cancer screening with the estimates ranging from 0% to 40–50% depending on invitational age and methods. We updated the estimates of overdiagnosis in Helsinki service screening study in Finland by comparing the observed and expected cumulative incidence of all breast carcinomas and invasive breast carcinomas.