Table 3.

Linear regression analyses of pain severity (dependent variable) and muscle strength (independent variable)

Strength (Newton meters)	Univariable B coefficient	P-value	Multivariable B coefficient*	P-value
Isometric knee extensor	−0.028 (95% CI, −0.072 to 0.016)	0.203	−0.048 (95% CI, −0.100 to 0.003)	0.066
Isokinetic knee extensor 60°/s	−0.050 (−0.098 to −0.002)	0.041	−0.062 (−0.114 to −0.010)	0.020
Isokinetic knee extensor 180°/s	−0.090 (−0.158 to −0.022)	0.010	−0.115 (−0.188 to −0.041)	0.003
Isokinetic knee flexor 60°/s	−0.095 (−0.179 to −0.011)	0.028	−0.114 (−0.205 to −0.023)	0.015
Isokinetic knee flexor 180°/s	−0.156 (−0.256 to −0.056)	0.003	−0.184 (−0.291 to −0.077)	0.001

Note:

^*Adjusted for age, sex, BMI, and opioid use.

Abbreviations: CI, confidence interval; BMI, body mass index.