RR and AR of breast cancer by follow-up interval among women who received mantle, MPA, or TNI at age 30 years or younger
| Intervals . | Person-years . | O . | E . | RR . | (95% CI) . | AR . |
|---|---|---|---|---|---|---|
| Overall | 5231 | 32 | 2.0 | 15.9 | (10.6, 22.0) | 57.3 |
| 0-5 | 1800 | 0 | 0.1 | 0.0 | (0.0, 30.0) | − 0.7 |
| 5-10 | 1443 | 2 | 0.3 | 6.8 | (0.8, 24.7) | 11.8 |
| 10-15 | 1026 | 2 | 0.5 | 4.1 | (0.5, 14.9) | 14.8 |
| 15-20 | 598 | 14 | 0.5 | 25.8 | (14.1, 43.3) | 225.0 |
| 20+ | 365 | 14 | 0.6 | 24.5 | (13.4, 41.1) | 368.2 |
| Intervals . | Person-years . | O . | E . | RR . | (95% CI) . | AR . |
|---|---|---|---|---|---|---|
| Overall | 5231 | 32 | 2.0 | 15.9 | (10.6, 22.0) | 57.3 |
| 0-5 | 1800 | 0 | 0.1 | 0.0 | (0.0, 30.0) | − 0.7 |
| 5-10 | 1443 | 2 | 0.3 | 6.8 | (0.8, 24.7) | 11.8 |
| 10-15 | 1026 | 2 | 0.5 | 4.1 | (0.5, 14.9) | 14.8 |
| 15-20 | 598 | 14 | 0.5 | 25.8 | (14.1, 43.3) | 225.0 |
| 20+ | 365 | 14 | 0.6 | 24.5 | (13.4, 41.1) | 368.2 |
RR indicates relative risk; AR, absolute excess risk; MPA, mantle and paraaortic; TNI, total nodal irradiation; O, observed; E, expected; CI, confidence interval.