Table 5

Spearman's rank-order correlations (r_s) and rank-order partial correlations (r_sp) between muscle function and future PROs at 5 years

	Knee function								Knee-specific activity
	KOOS Pain		KOOS Sport/rec		KOOS QoL		KOOS Q3		TAS		ARS
	r_s/r_sp	p Value	r_s/r_sp	p Value	r_s/r_sp	p Value	r_s/r_sp	p Value	r_s/r_sp	p Value	r_s/r_sp	p Value
Knee ext (W)	0.049	0.723	0.209	0.129	0.206	0.135	−0.275	0.044	0.215	0.119	0.321	0.018
Knee ext (W)*	0.105	0.461	0.098	0.489	0.187	0.184	−0.233	0.097	−0.012	0.934	0.281	0.044
Knee ext LSI (%)	0.148	0.284	0.031	0.823	0.198	0.151	−0.263	0.054	0.026	0.853	0.173	0.210
Knee ext LSI (%)*	0.145	0.306	0.050	0.726	0.203	0.148	−0.272	0.051	0.046	0.745	0.182	0.196
Knee flex LSI (%)	0.035	0.801	−0.131	0.351	−0.063	0.652	0.116	0.408	0.224	0.106	−0.007	0.959
Knee flex LSI (%)*	0.038	0.791	−0.123	0.391	−0.051	0.720	0.097	0.498	0.261	0.064	0.011	0.939
Leg press LSI (%)	0.017	0.903	−0.064	0.647	−0.009	0.949	0.053	0.706	−0.162	0.241	0.044	0.750
Leg press LSI (%)*	0.021	0.881	−0.036	0.800	0.040	0.778	−0.052	0.715	−0.088	0.533	0.139	0.326
Vertical hop (cm)	0.233	0.090	0.229	0.096	0.290	0.033	−0.292	0.032	0.103	0.459	0.154	0.266
Vertical hop (cm)*	0.308	0.026	0.145	0.305	0.281	0.044	−0.246	0.078	−0.097	0.496	0.058	0.683
Vertical hop LSI (%)	0.251	0.067	0.104	0.453	0.264	0.054	−0.285	0.037	−0.110	0.430	−0.018	0.898
Vertical hop LSI (%)*	0.249	0.075	0.136	0.337	0.284	0.041	−0.324	0.019	−0.071	0.616	0.008	0.954
Side hop (n)	0.121	0.382	0.164	0.236	0.139	0.317	−0.153	0.270	0.060	0.668	0.228	0.097
Side hop (n)*	0.139	0.327	0.109	0.443	0.109	0.440	−0.105	0.459	−0.045	0.752	0.181	0.199
Side hop LSI (%)	0.254	0.064	0.221	0.108	0.248	0.071	−0.165	0.232	0.182	0.188	0.145	0.294
Side hop LSI (%)*	0.250	0.074	0.280	0.045	0.256	0.067	−0.154	0.306	0.233	0.096	0.145	0.306
One leg hop LSI (%)	−0.086	0.535	−0.067	0.631	0.056	0.689	−0.142	0.307	−0.039	0.777	0.019	0.894
One leg hop LSI (%)*	−0.088	0.536	−0.075	0.598	0.046	0.746	−0.122	0.388	−0.062	0.665	−0.001	0.993
TSP total score	−0.195	0.162	−0.307	0.025	−0.340	0.013	0.375	0.006	−0.057	0.686	0.003	0.998
TSP total score*	−0.212	0.135	−0.274	0.052	−0.334	0.017	0.372	0.007	0.008	0.955	0.035	0.806

Bold numbers represent moderate correlations. Italic numbers represent close to moderate correlations. All assessment scores (except LSI) originate from the injured leg.
*Muscle function effect independent of gender and treatment.
ARS, Activity Rating Scale for disorders of the knee; KOOS, the Knee Injury and Osteoarthritis Outcome Score—function in sport and recreation (Sport/rec), knee-related quality of life (QoL), knee confidence (Q3); LSI, limb symmetry index; TAS, Tegner Activity scale; TSP, Test for Substitution Patterns; W, watt.