Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
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%) |
Abbreviations: CI confidence interval, NPBC non-progressive breast cancer
