Survival and prognostic factors in patients with stable and unstable spinal bone metastases from solid tumors: a retrospective analysis of 915 cases

Table 1 Patients‘ characteristics

		Stable metastases		Unstable metastases		All patients		p-value
		n	%	n	%	n	%
Age (years)	Mean (SD)	61.8 +/− 11.0		63.7 +/− 11.0		62.7 +/− 11.1		0.973
Gender	Male	246	50	243	50	489	53	0.983
	Female	214	50	212	50	426	47
KPS	<80	195	46	227	54	422	46	0.023
	> = 80	265	54	228	46	493	54
Primary site
	NSCLC	211	50	214	50	425	46	0.038
	Breast cancer	83	47	92	53	175	20
	Renal cancer	72	45	87	55	159	17
	Other	94	60	62	40	156	17
Localization metastases
	Thoracic	275	49	288	51	563	62	0.275
	Lumbar	185	53	167	47	352	38
Number metastases
	Solitary	243	58	174	42	417	46	<0.001
	Multiple	217	44	281	56	498	54
Other distant metastases
	Liver	102	55	84	45	186	20	0.163
	Brain	71	56	56	44	127	14	0.176
	Lung	111	58	81	42	192	21	0.019
	Skin	26	72	10	28	36	4	0.007
Bisphosphonates		327	51	320	49	647	71	0.801
Chemotherapy		266	53	236	47	502	55	0.065
Orthopedic corset		140	32	302	68	442	48	<0.001
Radiotherapy schedule
	10 × 3 Gy	349	53	314	47	663	72	0.092
	14 × 2.5 Gy	36	40	53	60	89	10
	20 × 2 Gy	68	45	82	55	150	16
	Other	7	54	6	46	13	1

ISSN: 1471-2407