Table 4.

Strength of association between quadriceps strength and knee extension range of motion with sagittal plane knee joint biomechanics during gait in patients with knee osteoarthritis.

	Quadriceps Strength		Knee Extension Range of Motion
	β Coefficient	p-value	β Coefficient	p-value
Knee flexion angle at heel contact (degrees)	−0.58	0.75	−0.44	<0.001*
Peak loading response knee flexion angle (degrees)	2.32	0.19	−0.34	0.002*
Loading response knee flexion excursion (degrees)	2.89	0.03*	0.10	0.24
Peak single leg stance knee flexion (+)/extension (−) angle (degrees)	−1.35	0.47	−0.66	<0.001*
Peak loading response external knee flexion (+)/extension (−) moment (Nm/kg)	0.32	0.002*	−0.002	0.70
Peak single leg stance external knee flexion (+)/extension (−) moment (Nm/kg)	0.18	0.03*	−0.13	0.01*

All multiple regression analyses were adjusted for age, gender, BMI, radiographic tibiofemoral and patellofemoral joint disease severity and gait speed.

^*Denotes significant association (P < 0.05) between variables within the multiple regression model.