Table 4 Number of screen-detected cases, expected number of detected non-progressive breast cancers, and the frequency of overdiagnosis (percentage) by round of screening
Screening round | Number of screen-detected cases | Expected number of detected NPBCs | Overdiagnosis (95% CI) |
|---|---|---|---|
Prevalent | 1799 | 15.57 | 0.87% (0.20%, 4.31%) |
Subsequent | 6506 | 20.33 | 0.31% (0.07%, 1.59%) |
Overall | 8305 | 35.90 | 0.43% (0.10%, 2.18%) |