Table 1. Demographic data of responding spine surgeons.

Survey question	Frequency, N=273	Percent	Valid percent	Cumulative percent
Postgraduate training
Missing responses	127	46.5	46.5	46.5
Neurosurgeon	57	20.9	20.9	67.4
Orthopaedic surgeon	89	32.6	32.6	100.0
Fellowship training
Missing responses	130	47.6	47.6	47.6
Spine fellowship trained (6–12 months)	143	52.4	52.4	100.0
Employment setting
Missing responses	35	12.8	12.8	12.8
Hospital employed	139	50.9	50.9	63.7
Private practice setting	66	24.2	24.2	87.9
University setting	33	12.1	12.1	100.0
Practice setting
Missing responses	206	75.5	75.5	75.5
I prefer not to answer	5	1.8	1.8	77.3
Multispecialty group	29	10.7	10.7	88.0
Single specialty group	33	12.0	12.0	100.0
Number of surgeons in my group
1	20	7.3	7.3	7.3
2	49	17.9	17.9	25.3
3	33	12.1	12.1	37.4
4	25	9.2	9.2	46.5
5	26	9.5	9.5	56.0
6	24	8.8	8.8	64.8
7	13	4.8	4.8	69.6
8	14	5.1	5.1	74.7
9	10	3.7	3.7	78.4
10	59	21.6	21.6	100.0
Respondent surgeons’ age
18 to 24	2	.7	.7	.7
25 to 34	32	11.7	11.7	12.5
35 to 44	112	41.0	41.0	53.5
45 to 54	84	30.8	30.8	84.2
55 to 64	31	11.4	11.4	95.6
65 or older	12	4.4	4.4	100.0
Region
China	117	42.9	42.9	42.9
Mexico	36	13.2	13.2	56.0
Colombia	27	9.9	9.9	65.9
Brazil	26	9.5	9.5	75.5
India	13	4.8	4.8	80.2
South Korea	10	3.7	3.7	83.9
United States of America	10	3.7	3.7	87.5
Argentina	5	1.8	1.8	89.4
Iran	2	0.7	0.7	90.1
Taiwan	2	0.7	0.7	90.8
United Kingdom	2	0.7	0.7	91.6
Other	23	8.4	8.4	100.0