Multiple Logistic regression coefficients for primary outcome including only participants with baseline assessment within six months of surgery (n=231).

	Coefficient	S.E.	Wald Z	p value
Intercept	0.57	0.450	1.27	0.203
BMI ≥40	0.05	0.910	0.05	0.959
K&L Grade ≤3	0.98	0.361	2.72	0.007
WOMAC Total	−0.83	0.148	−5.62	<0.001
MCS (Mild)	−1.05	0.617	−1.71	0.089
MCS (Mod/Severe)	1.24	0.875	1.41	0.158

OAI, Osteoarthritis Initiative; SE, standard error; BMI, body mass index; K&L, Kellgren and Lawrence knee osteoarthritis grade; WOMAC, Western Ontario and McMaster Universities Arthritis Index, MCS, mental component score of the Short Form Health Survey.