Table 3.

Multivariate analysis of survival in SCLC patients with bone metastases at initial diagnosis.

Potential prognostic factor	Hazard Ratio	95%CI	P
Age	1.847	1.159-2.942	0.010
Coexisting with extraosseous metastases	2.324	1.475-3.661	0.000
Number of bone metastases	1.776	1.040-3.034	0.036
N stage	1.046	0.628-1.744	0.832
Number of vertebrate bone metastases	1.165	0.718-1.891	0.449
LDH level	0.731	0.469-1.137	0.136

Abbreviations: LDH= lactate dehydrogenase