Table 3.
Survival in patients with BC with bone metastases (N=2427) by stage of disease at BC diagnosis and by length of bone metastasis-free interval
| 1-year survival % (95% CI) | 3-year survival* % (95% CI) | 5-year survival† % (95% CI) | |
|---|---|---|---|
| Stage of disease at BC diagnosis | |||
| Localised | 59.0 (54.2 to 63.6) | 35.2 (30.2 to 40.2) | 19.6 (15.3 to 24.5) |
| Regional | 50.7 (47.9 to 53.5) | 25.0 (22.4 to 27.7) | 12.4 (10.2 to 14.9) |
| Metastatic | 52.0 (47.9 to 55.9) | 22.8 (19.3 to 26.6) | 9.5 (6.9 to 12.6) |
| Unknown | 49.7 (42.6 to 56.5) | 27.3 (20.2 to 34.9) | 13.3 (7.3 to 21.2) |
| Length of bone metastasis-free interval (years) | |||
| <1 | 64.4 (61.2 to 67.4) | 37.8 (34.4 to 41.2) | 21.0 (17.9 to 24.2) |
| 1 to <3 | 39.9 (36.3 to 43.6) | 16.4 (13.5 to 19.5) | 6.7 (4.7 to 9.2) |
| 3 to <5 | 47.0 (42.4 to 51.4) | 18.5 (14.7 to 22.6) | 7.4 (4.7 to 10.9) |
| ≥5 | 52.6 (47.4 to 57.6) | 25.7 (20.5 to 31.3) | 8.6 (4.8 to 13.7) |
| Overall | 52.4 (50.4 to 54.4) | 26.4 (24.5 to 28.3) | 13.1 (11.4 to 14.8) |
*Restricted to patients with bone metastasis diagnosed prior to 2010.
†Restricted to patients with bone metastasis diagnosed prior to 2008.
BC, breast cancer.