Table 1.

Patient Demographics

	Cohort n = 150			Responders n = 69			Nonresponders n = 81
Parameter	Mean	SD	Range	Mean	SD	Range	Mean	SD	Range	P value
Age (years)	49	17	19–92	53	17	19–84	46	17	19–92	0.0046
Education (years)	16	2.5	10–22	16	2.5	10–22	16	2.4	12–20	0.37
Parameter	Number		%	Number		%	Number		%
Gender
Male	72		48	36		52	36		44	0.35
Female	78		52	33		48	45		56
Type of visit
New patient	50		33	25		36	25		31	0.49
Follow-up	100		67	44		64	56		69
Sought treatment for condition before
Yes	48		32	18		26	30		37	0.15
No	102		68	51		74	51		63
Other pain conditions
Yes	48		32	24		35	24		30	0.50
No	102		68	45		65	57		70
Prior surgery
Yes	19		13	10		14	9		11	0.54
No	131		87	59		86	72		89
Marital status
Single	57		38	22		32	35		43	0.56
Living with partner	2		1.3	1		1.5	1		1.2
Married	68		45	36		52	32		40
Separated/Divorced	15		10	6		8.7	9		11
Widowed	8		5.3	4		5.8	4		4.9
Working status
Full-time	93		62	35		51	58		72	0.041
Part-time	10		6.7	6		59	4		4.9
Homemaker	1		0.67	0		0	1		1.2
Retired	24		16	17		25	7		8.6
Unemployed, able to work	4		2.7	3		4.4	1		1.2
Unemployed, not able to work	10		6.7	5		7.3	5		6.2
On worker’s compensation	2		1.3	0		0	2		2.5
Currently on sick leave	6		4.0	3		4.4	3		3.7
Smoking
Yes	17		11	3		4.4	14		17	0.018
No	133		89	66		96	67		83