Table 1.

Patient characteristics

No. of fractions	All	1	3	5
No. of lesions	353	270 (76%)	70 (20%)	13 (4%)
Median age, y (range)	67.2 (20-89)	67.9 (30-86)	65.0 (20-87)	61.8 (21-89)
Sex
Male	265 (75%)	211 (78%)	43 (61%)	11 (85%)
Female	88 (25%)	59 (22%)	27 (39%)	2 (15%)
ECOG performance status
0	213 (60%)	166 (61%)	42 (60%)	5 (38%)
1	107 (30%)	77 (29%)	24 (34%)	6 (46%)
2	30 (8%)	24 (9%)	4 (6%)	2 (15%)
3	2 (1%)	2 (1%)	0 (0%)	0 (0%)
4	1 (0%)	1 (0%)	0 (0%)	0 (0%)
Bilsky grade
0	268 (76%)	217 (80%)	41 (59%)	10 (77%)
1	52 (15%)	38 (14%)	14 (20%)	0 (0%)
2	26 (7%)	10 (4%)	13 (19%)	3 (23%)
3	7 (2%)	5 (2%)	2 (3%)	0 (0%)
SINS category
≤6	214 (61%)	173 (64%)	34 (49%)	7 (54%)
≥7	139 (39%)	97 (36%)	36 (51%)	6 (46%)
Location of treatment
Cervical	70 (19%)	55 (20%)	12 (17%)	3 (23%)
Cervical + thoracic	3 (1%)	1 (0%)	2 (3%)	0 (0%)
Thoracic	259 (71%)	192 (71%)	49 (70%)	8 (62%)
Thoracic + lumbar	2 (1%)	2 (1%)	0 (0%)	0 (0%)
Lumbar	29 (8%)	20 (20%)	7 (7%)	2 (15%)
No. of lesions treated
1	268 (76%)	216 (80%)	44 (63%)	8 (62%)
2	53 (15%)	36 (13%)	15 (21%)	2 (15%)
3	27 (8%)	17 (6%)	7 (10%)	3 (23%)
4	5 (1%)	1 (0%)	4 (6%)	0 (0%)
Primary tumor
Prostate	150 (42%)	136 (50%)	14 (20%)	0 (0%)
Kidney	56 (16%)	40 (15%)	14 (20%)	2 (15%)
Endometrial	29 (8%)	24 (9%)	5 (7%)	0 (0%)
Sarcoma	28 (8%)	13 (5%)	7 (10%)	8 (62%)
Lung	27 (8%)	16 (6%)	11 (16%)	0 (0%)
Other	63 (18%)	41 (15%)	19 (27%)	3 (23%)
Histology
Adenocarcinoma	179 (51%)	153 (57%)	26 (37%)	0 (0%)
Other	174 (49%)	117 (43%)	44 (63%)	13 (100%)

Abbreviations: ECOG = Eastern Cooperative Oncology Group; SINS = spinal instability neoplastic score.