Table 2.

Cox regression model of prognostic factors for bone survival

	HR	95 % CI	p-value
Age	1.036	1.015–1.057	<0.001
KPS	1.000	0.981–1.019	0.997
Chemotherapy	1.452	0.926–2.277	0.104
Number of metastases	0.469	0.292–0.753	0.002
Local response	1.071	0.661–1.736	0.779
Bisphosphonates	1.109	0.477–2.577	0.810
Orthopedic corset	0.821	0.500–1.350	0.437
Pathological fracture	1.533	0.614–3.827	0.360
Luminal A	1.538	0.998–2.167	0.945
Luminal B	1.152	0.876–1.825	0.745
HER2	1.472	0.977–1.957	0.628
Triple negative	1.068	0.933–1.125	<0.001