. Author manuscript; available in PMC: 2018 Dec 28.

Published in final edited form as: J Orthop Res. 2016 Oct 17;35(3):651–656. doi: 10.1002/jor.23408

Table 3.

Regression Analysis of Biomechanical and Co-Contraction Variables to Medial Compartment Contact Force 6 Months After ACL Reconstruction

	R²	p-Value (Overall Model)	R² Change	p-Value (R² Change)
Involved
pKFM	0.072	0.150	0.072	0.15
pKFM + pKAM	0.343	0.003	0.271	0.002^***
pKFM + pKAM + GRF	0.365	0.007	0.022	0.357
pKFM + pKAM + GRF + CoC	0.380	0.015	0.015	0.442
Uninvolved
pKFM	0.036	0.319	0.036	0.319
pKFM + pKAM	0.396	0.001	0.361	<0.001^***
pKFM + pKAM + GRF	0.751	<0.001	0.355	<0.001^***
pKFM + pKAM + GRF + CoC	0.790	<0.001	0.038	0.043^***

pKFM, peak external knee flexion moment; pKAM, peak external knee adduction moment; GRF, vertical ground reaction force; CoC, co-contraction of the knee flexors and knee extensors.

^***

p≤ 0.05.