Table 3.

Improvements in Outcome Measures in the Comprehensive Behavioral Intervention (CBI) and Standard of Care Exercise (SCE) Groups above Minimum Clinically Important Improvement

Domain		Outcome	CBI N (%)	SCE N (%)	Difference between groups
Physical Function	Patient-reported	WOMAC-PF§	16 (76)	12 (60)	16%
		RAND-PF‡	14 (67)	8 (40)	27%
	Performance-based tests	Stair climbing (seconds)	11 (52)	4 (20)	32%
		Chair stand (seconds)	6 (29)	4 (20)	9%
		Single-leg-stance (seconds)	10 (48)	1 (5)	43%
		Six-minute walk (meters)	5 (24)	2 (10)	14%
		Gait speed (meter/second)	5 (24)	1 (6)	18%
Physical Activity		Daily activity (minutes/day)¶	8 (47)	5 (26)	21%

^§WOMAC-PF: Physical Function scale of the Western Ontario and McMaster Universities Osteoarthritis Index, which is self-administered questionnaire that assesses physical functioning based on 17 activities. Scores range from 0 to 68.

^‡RAND-PF: Physical Function score of RAND-36, which is a self-administered questionnaire that assesses physical functioning based on 10 activities.

^¶Number of subjects with physical activity data is 17 in the CBI group and 19 in the SCE group. Four subjects in the CBI (one refused wearing the accelerometer and three returned the accelerometers with insufficient data) and one in the SCE group had insufficient data (i.e., refused wearing the accelerometer at 6 months).