Characteristics | Median OS | P value | HR | 95% CI for HR |
---|---|---|---|---|
Age at diagnosis |  | < 0.001 |  |  |
 40–44 years | 42 |  | Reference |  |
 45–49 years | 41 |  | 1.013 | 0.829–1.237 |
 50–54 years | 39 |  | 1.103 | 0.915–1.329 |
 55–59 years | 32 |  | 1.364 | 1.139–1.634 |
Race |  | < 0.001 |  |  |
 White | 41 |  | Reference |  |
 Black | 28 |  | 1.498 | 1.315–1.707 |
 Other a | 38 |  | 1.003 | 0.824–1.220 |
Marital status |  | < 0.001 |  |  |
 Single | 32 |  | Reference |  |
 Married | 42 |  | 0.723 | 0.638–0.819 |
 Other b | 35 |  | 0.903 | 0.772–1.057 |
Insurance |  | < 0.001 |  |  |
 Uninsured | 26 |  | Reference |  |
 Insured | 38 |  | 0.633 | 0.513–0.781 |
Grade |  | < 0.001 |  |  |
 I | 48 |  | Reference |  |
 II | 44 |  | 1.214 | 0.953–1.547 |
 III or IV | 28 |  | 2.071 | 1.634–2.625 |
Histology | Â | 0.003 | Â | Â |
 Ductal | 36 |  | Reference |  |
 Lobular | 44 |  | 0.748 | 0.624–0.897 |
 Others | 40 |  | 0.856 | 0.713–1.028 |
Laterality | Â | 0.084 | Â | Â |
 Right | 38 |  | Reference |  |
 Left | 38 |  | 1.058 | 0.949–1.179 |
 Bilateral, single primary | 13 |  | 2.254 | 1.008–5.039 |
Tumour subtype |  | < 0.001 |  |  |
 HR+/HER2- | 39 |  | Reference |  |
 HR+/HER2+ | 52 |  | 0.747 | 0.640–0.873 |
 HR−/HER2- | 11 |  | 3.571 | 3.071–4.152 |
 HR−/HER2+ | 35 |  | 1.132 | 0.917–1.397 |
Bone+Lung metastases |  | < 0.001 |  |  |
 No | 42 |  | Reference |  |
 Yes | 23 |  | 1.888 | 1.679–2.123 |
Bone+Liver metastases |  | < 0.001 |  |  |
 No | 44 |  | Reference |  |
 Yes | 22 |  | 2.182 | 1.950–2.443 |
Bone+Brain metastases |  | < 0.001 |  |  |
 No | 40 |  | Reference |  |
 Yes | 14 |  | 2.674 | 2.245–3.184 |
Only bone metastases |  | < 0.001 |  |  |
 No | 46 |  | Reference |  |
 Yes | 24 |  | 2.29 | 2.04–2.559 |
Surgery |  | < 0.001 |  |  |
 No | 32 |  | Reference |  |
 Yes | 52 |  | 0.496 | 0.433–0.568 |