Table 1 . The incidence proportion and median survival of breast cancer patients with lung metastases stratified by subtypes.
| Subtypes | Patients No. | Incidence proportion of lung metastases, % | Survival among patients with lung metastases, median (IQR), months |
|||
|---|---|---|---|---|---|---|
| With breast cancer |
With metastatic disease |
With lung metastases |
Among entire cohort |
Among subset with metastatic disease |
||
| HR+/HER2− | 253,783 | 10,909 | 2,940 | 1.2 | 27.0 | 16.0 (6.0–31.0) |
| HR+/HER2+ | 36,458 | 2,872 | 852 | 2.3 | 29.7 | 17.0 (7.0–31.0) |
| HR−/HER2+ | 15,727 | 1,557 | 547 | 3.5 | 35.1 | 12.0 (5.0–25.0) |
| Triple-negative | 39,147 | 2,473 | 983 | 2.5 | 39.7 | 8.0 (3.0–16.0) |
| Unknown | 34,146 | 3,624 | 1,194 | 3.5 | 32.9 | 8.0 (2.0–22.0) |
| All subtypes | 379,261 | 21,435 | 6,516 | 1.7 | 30.4 | 13.0 (5.0–27.0) |