Method of detection | Total number of events | Person-time, years | HR (95% CI) | P value |
---|---|---|---|---|
 | Ipsilateral invasive breast cancer |  |  |  |
Non-screening-related | 98 | 18,710 | ref | Â |
Screen-detected | 231 | 50,422 | 0.75 (0.59–0.96) | 0.024 |
Interval | 34 | 6359 | 1.02 (0.68–1.51) | 0.941 |
 | Contralateral invasive breast cancer |  |  |  |
Non-screening-related | 105 | 18,825 | ref | Â |
Screen-detected | 243 | 50,467 | 0.86 (0.67–1.10) | 0.224 |
Interval | 30 | 6387 | 0.83 (0.54–1.26) | 0.382 |
 | All-cause mortality |  |  |  |
Non-screening-related | 398 | 19,361 | ref | Â |
Screen-detected | 594 | 51,740 | 0.85 (0.73–0.98) | 0.028 |
Interval | 68 | 6570 | 0.73 (0.56 − 0.96) | 0.025 |