Annual breast cancer screening including mammography v usual care to prevent breast cancer mortality †
| Cumulative breast cancer mortality rates/10 000 women | |||
|---|---|---|---|
| Years offollow up | Mammography | Usual care | Rate ratio (95% CI) |
| †All comparisons are not significant. | |||
| 2–5 | 2.26 | 2.12 | 1.07 (0.75 to 1.52) |
| 6 | 2.55 | 2.51 | 1.01 (0.73 to 1.41) |
| 7 | 3.04 | 2.90 | 1.05 (0.78 to 1.42) |
| 8 | 3.29 | 3.15 | 1.04 (0.78 to 1.40) |
| ≥9 | 3.72 | 3.82 | 0.97 (0.74 to 1.27) |