The Influence of Radiographic Severity on the Relationship between Muscle Strength and Joint Loading in Obese Knee Osteoarthritis Patients

Table 2

The relationships between isometric muscle strength and external knee adduction moment for obese people with knee osteoarthritis of different radiographic disease severities.

	Beta coefficient (SE)	𝑟 value	𝑃 value	𝑃 value for difference
Unadjusted
Quadriceps strength
Less severe	0.14 (0.24)	0.05	.58	.015
Severe	1.13 (0.32)	0.29	<.001
Pooled	0.63 (0.20)	0.26	.002	n/a
Hamstring strength
Less severe	0.65 (0.71)	0.08	.37	.078
Severe	2.39 (0.68)	0.29	<.001
Pooled	1.52 (0.49)	0.26	.003	n/a
Adjusted ∗
Quadriceps strength
Less severe	0.04 (0.22)	0.01	.87	.13
Severe	0.39 (0.32)	0.16	.063
Pooled	0.21 (0.20)	0.09	.28	n/a
Hamstring strength
Less severe	0.44 (0.64)	0.07	.42	.18
Severe	1.60 (0.70)	0.20	.019
Pooled	1.02 (0.51)	0.17	.047	n/a

∗Values are adjusted for knee joint mechanical axis, walking speed, gender, age, pain, and body mass as covariates.