. Author manuscript; available in PMC: 2022 Sep 1.

Published in final edited form as: Reg Anesth Pain Med. 2021 Jul 2;46(9):752–756. doi: 10.1136/rapm-2021-102501

Table 1.

Baseline sample characteristics by intervention group

	Intervention group
Characteristic	RFA (n=30)	Sham (n=30)	P value^*^,†
Sex, n (%)			0.07
Male	16 (53.3)	9 (30.0)
Female	14 (46.7)	21 (70.0)
Race/Ethnicity, n (%)			0.19
Non-Hispanic white	24 (80.0)	26 (86.7)
Non-Hispanic black	5 (16.7)	1 (3.3)
Hispanic	1 (3.3)	1 (3.3)
Other/Not reported	0 (0.0)	2 (6.7)
Age (years)	63.1±8.5	66.8±7.6	0.08
Body mass index	34.9±6.0	30.4±5.7	<0.001
Pain at rest (0–10)	4.8±2.7	4.6±2.2	0.82
Pain with ambulation (0–10)	6.0±2.4	5.8±1.8	0.70
PROMIS—Physical Function (0–100)	37.8±6.1	36.5±4.9	0.36

Note: All values are n (%) or mean±SD. PROMIS—Physical Function values are T scores, with a mean of 50 and an SD of 10. Lower values on this measure indicate greater functional limitations.

P value compares RFA versus sham groups.

^†

χ² tests were used for categorical measures and between-subject t-tests were used for continuous measures.

PROMIS, Patient Reported Outcome Measurement Information System; RFA, radiofrequency ablation.