Predicting the Incidence and Prognosis of Bone Metastatic Breast Cancer: A SEER-Based Observational Study

Table 6

Cox multivariate analysis of overall survival in bone metastasis from breast cancer without brain metastasis.

Characteristics	HR	95% CI	value
Age at diagnosis (continuous)	1.018	1.015-021	<0.001
Subtype
TNBC	Reference
Luminal A	0.484	0.395-0.593	<0.001
Luminal B	0.481	0.414-0.559	<0.001
HER2+	0.484	0.395-0.593	<0.001
Liver metastasis
No	Reference
Yes	1.688	1.536-1.855	<0.001
Lung metastasis
No	Reference
Yes	1.228	1.122-1.344	<0.001
Grade
1-2	Reference
3-4	1.183	1.084-1.291	<0.001
T stage
0-2	Reference
3-4	1.216	1.118-1.322	<0.001