Table 5.

Coefficient, p-value and pseudo-R2 after univariate quantile regression to predict the Goodman A score

Variable	Coefficient	P-Value	Pseudo-R2
Age	0 (-0.32 to 0.32)	0.999	0.001
Male	-6.25 (-11.94 to -0.56)	0.030*	0.001
WOMAC-pain	-2.84 (–3.33 to -2.36)	< 0.000*	0.260
WOMAC-Stiffness	-6.25 (-7.43 to -5.07)	< 0.000*	0.240
WOMAC-Function	-0.80 (-0.95 to 105.03)	< 0.000*	0.240
Kujala	0.42 (0.26 to 0.59)	< 0.000*	0.200
KOOS QL	0.22 (0.12 to 0.32)	< 0.000*	0.180
Anterior knee pain	-12.5 (-20.6 to -4.41)	0.003*	0.060
Follow-up	-0.70 (-2.51 to 1.11)	0.444	0.010
ROM	0 (-0.21 to 0.21)	0.999	0.001
Extension	0 (-0.61 to 0.61)	0.999	0.001
Extension difference	0 (-0.61 to 0.61)	0.999	0.001
Flexion	0 (-0.25 to 0.25)	0.999	0.001
Flexion difference	0 (-0.24 to 0.24)	0.999	0.001
BMI at FU	0 (-0.59 to 0.59)	0.999	0.001
Up and Go test	-0.64 (-1.32 to 0.05)	0.070	0.020
Situp test	0 (-0.81 to 0.81)	0.999	0.001
Muscular force	0 (-0.03 to 0.03)	0.999	0.001
Algometry	0.32 (-0.12 to 0.77)	0.150	0.002

Abbreviations: WOMAC Western Ontario and McMaster Universities Osteoarthritis Index, KOOS QL Knee injury and osteoarthritis outcome score quality of life, ROM Range of motion, BMI Body mass index, FU Follow-up

^*significant coefficient (p-value < 0.05)