Table 8.

Analysis of covariance (ANCOVA) “knee function” with the factor “sex” and the covariate “age” (numerical), including interaction effects with the factor “intervention” (R2=0.402).

	SSQa	df 1	F	P value	η 2	Partial η2
KOOSADLb score PREc	6851.619	1	62.332	<.001	0.189	0.240
Intervention	6548.347	1	68.131	<.001	0.180	0.232
Sex	4.004	1	0.028	.87	<0.001	<0.001
Age	79.046	1	0.786	.38	0.002	0.004
Recruiter	845.762	6	1.093	.36	0.023	0.037
Pain medication	99.632	1	1.046	.31	0.003	0.005
Pain level	106.118	1	1.038	.31	0.003	0.005
Intervention: sex	13.906	1	0.112	.74	<0.001	0.001
Intervention: age	46.122	1	0.440	.51	0.001	0.002
Sex: age	2.104	1	0.012	.91	<0.001	<0.001
Intervention: sex: age	4.034	1	0.028	.87	<0.001	<0.001
Residual	21,732.292	—d	—	—	—	—

^aSSQ: sum of squares.

^bKOOS_ADL: Knee Injury and Osteoarthritis Outcome Score—Activities of Daily Living.

^cPRE: survey before the first therapy session.

^dNot applicable.