Table 3.
Incidence rates of bone metastases among breast cancer patients, and incidence rates of skeletal-related events (SREs) among breast cancer patients with bone metastases, from the first year after primary diagnosis of breast cancer and bone metastases, respectively, up to five years after diagnosis, Denmark, 1999-2007.
| Event | n | Year 1 | Year 2 - Year 5 | Year 1 - Year 5 | |
|---|---|---|---|---|---|
| Per 1,000 person-years (95% CI) | |||||
| All patients | Bone metastasis | 1,272 | 13.6 (12.4 - 14.9) |
8.8 (8.2 - 9.5) |
10.2 (9.6 - 10.8) |
| First SRE | 712 | 759.2 (662.0 - 870.5) |
513.8 (465.4 - 567.3) |
578.0 (533.4 - 626.2) |
|
| Localized | Bone metastasis | 237 | 3.3 (2.5 - 4.4) |
3.9 (3.3 - 4.5) |
3.7 (3.2 - 4.3) |
| First SRE | 117 | 503.1 (285.7 - 885.9) |
574.7 (462.8 - 713.5) |
564.4 (461.1 - 690.9) |
|
| Regional | Bone metastasis | 663 | 12.9 (11.1 - 15.1) |
13.5 (12.3 - 14.8) |
13.3 (12.3 - 14.5) |
| First SRE | 310 | 774.6 (596.1 - 1006.5) |
560.7 (490.7 - 640.6) |
594.5 (527.8 - 669.5) |
|
| Distant | Bone metastasis | 358 | 172.5 (147.9 - 201.4) |
49.7 (38.8 - 63.6) |
101.8 (89.3 - 116.0) |
| First SRE | 176 | 760.1 (620.9 - 930.4) |
421.5 (329.9 - 538.5) |
573.5 (490.7 - 670.2) |
|