TABLE 4.

Results of 2-Way Analyses of Covariance^a

	df	F Value	P Value	Partial η2 Value	R 2 Value
Change in KOOSPAIN as DV (n = 99)					0.361
Treatment group	1	0.002	.967	0.000
Mechanical symptoms	1	5.100	.026	0.051
Treatment group × mechanical symptoms	1	5.634	.020	0.057
KOOSPAIN at baseline (covariate)	1	31.713	<.001	0.252
Change in KOOSSYMPTOMS as DV (n = 100)					0.291
Treatment group	1	0.749	.389	0.008
Mechanical symptoms	1	1.183	.279	0.012
Treatment group × mechanical symptoms	1	4.322	.040	0.044
KOOSSYMPTOMS at baseline (covariate)	1	30.708	<.001	0.244
Change in KOOSADL as DV (n = 98)					0.403
Treatment group	1	0.572	.451	0.006
Mechanical symptoms	1	2.761	.100	0.029
Treatment group × mechanical symptoms	1	5.706	.019	0.058
KOOSADL at baseline (covariate)	1	38.440	<.001	0.292
Change in KOOSSPORTS as DV (n = 98)					0.154
Treatment group	1	0.019	.890	0.000
Mechanical symptoms	1	2.123	.148	0.022
Treatment group × mechanical symptoms	1	0.487	.487	0.005
KOOSSPORTS at baseline (covariate)	1	11.143	.001	0.107
Change in KOOSQoL as DV (n = 99)					0.204
Treatment group	1	0.346	.558	0.004
Mechanical symptoms	1	2.003	.160	0.021
Treatment group × mechanical symptoms	1	1.817	.181	0.019
KOOSQoL at baseline (covariate)	1	15.048	<.001	0.138
Change in EQ-5D as DV (n = 98)					0.554
Treatment group	1	0.455	.502	0.005
Mechanical symptoms	1	0.312	.578	0.003
Treatment group × mechanical symptoms	1	0.839	.362	0.009
EQ-5D at baseline (covariate)	1	109.670	<.001	0.541
Change in EQ-VAS as DV (n = 95)					0.487
Treatment group	1	0.155	.695	0.002
Mechanical symptoms	1	1.310	.255	0.014
Treatment group × mechanical symptoms	1	0.489	.486	0.005
EQ-VAS at baseline (covariate)	1	81.599	<.001	0.476

^aADL, activities of daily living; DV, dependent variable; EQ-5D, EuroQol 5 dimensions; EQ-VAS, EuroQol visual analog scale; KOOS, Knee injury and Osteoarthritis Outcome Score; QoL, quality of life.