Table 1

Study outcomes: original CRFA group versus IAS group up to 12 months†

	Numeric Rating Scale
	Baseline		1Month		3Months		6Months		12Months
	CRFA	IAS	CRFA	IAS	CRFA	IAS	CRFA	IAS	CRFA	IAS
N	76	75	67	69	65	68	58	68	52	4
Mean	7.3	7.2	3.0	3.9	2.8	5.2	2.5	5.9	3.1	3.3
SD	1.2	1.0	2.3	2.2	2.2	2.0	2.3	2.2	2.7	3.3
P value for difference between groups*	0.55		0.025		<0.0001		<0.0001		0.99

	Oxford Knee Score
	Baseline		1Month		3Months		6Months		12Months
	CRFA	IAS	CRFA	IAS	CRFA	IAS	CRFA	IAS	CRFA	IAS
N	76	75	67	69	65	68	58	67	52	3
Mean	16.7	16.9	33.3	29.4	34.6	24.6	35.7	22.4	34.3	22
SD	4.4	5.1	9.2	8.5	8.3	7.6	8.8	8.5	11.1	16.6
P value for difference between groups*	0.83		0.004		<0.0001		<0.0001		0.11

	Global perceived effect
	Baseline		1Month		3Months		6Months		12Months
	CRFA	IAS	CRFA	IAS	CRFA	IAS	CRFA	IAS	CRFA	IAS
Number of subjects improved/total number of subjects (percentage of group improved)	12/72 (16.7)	7/71 (9.9)	53/67 (79.1)	46/69 (66.7)	52/65 (80.0)	21/68 (30.9)	53/58 (91.4)	16/67 (23.9)	39/52 (75)	2/4 (50)
P value for difference between groups†	0.23		0.1		<0.0001		<0.0001		0.29

*P≤0.05 indicates a significant difference.
†Full-analysis study set data are presented.
CRFA, cooled radiofrequency ablation; IAS, intra-articular steroid; N, number of study subjects.