Table 5. 10-year survival by mode of detection for women aged 50–64 years with invasive breast tumours in 10 NPI categories.
|
Screen detected
|
|||||||
|---|---|---|---|---|---|---|---|
|
Symptomatic
|
10-year survival
|
||||||
| NPI | N (%) | 10-year survival (%) | N (%) | Unadjusted for lead time | Difference from symptomatic | Adjusted for lead time | Difference from symptomatic |
| <2.3 | 299 (4.4) | 94.3 | 997 (18.7) | 96.4 | 2.1 | 94.6 | 0.3 |
| 2.30<3.17 | 415 (6.2) | 88.1 | 706 (13.2) | 96.0 | 7.9 | 87.5 | −0.6 |
| 3.17<3.30 | 392 (5.8) | 88.7 | 766 (14.4) | 95.0 | 6.3 | 88.9 | 0.2 |
| 3.30<3.41 | 654 (9.7) | 85.7 | 626 (11.7) | 91.1 | 5.4 | 82.5 | −3.2 |
| 3.41<4.21 | 749 (11.1) | 74.9 | 576 (10.8) | 85.5 | 10.6 | 75.9 | 1.0 |
| 4.21<4.38 | 654 (9.7) | 80.9 | 524 (9.8) | 78.6 | −2.3 | 62.8 | −18.1 |
| 4.38<4.51 | 808 (12.0) | 71.2 | 352 (6.6) | 74.6 | 3.4 | 69.6 | −1.6 |
| 4.51<5.28 | 826 (12.2) | 59.0 | 257 (4.8) | 70.4 | 11.4 | 60.4 | 1.4 |
| 5.28<5.70 | 961 (14.2) | 48.3 | 325 (6.1) | 55.0 | 6.7 | 38.9 | −9.4 |
| ⩾5.70 | 992 (14.7) | 28.6 | 209 (3.9) | 35.1 | 6.5 | 23.3 | −5.3 |
| Total | 6750 (100) | 66.1 | 5338 (100) | 84.7 | 18.6 | 75.5 | 9.4 |
Abbreviation: NPI=Nottingham Prognostic Index.