TABLE 1.

Subject Baseline Demographics

	RFA
Variable at baseline	Cooled (n = 21)	Traditional (n = 18)	P*
Age	53.6 (13.7)	58.4 (13.5)	0.282
BMI	32.4 (9.0)	28.1 (5.6)	0.084
Duration of pain (months)	72.4 (66.5)	102.2 (112.0)	0.311
Percent relief from diagnostic block	0.9 (0.1)	0.8 (0.2)	0.160
Morphine equivalents	11.3 (18.9)	10.7 (24.1)	0.936
Fluoroscopy time (sec)	63.3 (35.1)	62.8 (33.8)	0.960
Procedure time (min)	32.8 (10.6)	38.2 (11.9)	0.141
CESD	12.7 (6.9)	10.1 (6.7)	0.233
PASS	41.5 (23.5)	37.5 (21.0)	0.610
MPI total	13.1 (9.2)	11.2 (6.4)	0.463
Gender [frequency (%)]
Male (n = 16)	8 (38.1)	8 (44.4)	0.688**
Female (n = 23)	13 (61.9)	10 (55.6)
Positive facet loading [frequency (%)]
Yes (n = 27)	13 (61.9)	14 (77.8)	0.284**
No (n = 12)	8 (38.1)	4 (22.2)

Values are mean (SD) unless specified otherwise.

^*from independent t-test unless specified otherwise.

^**from Pearson’s χ² test.