Table 1:

Multivariable analysis of predictors of pain and function at 2 years^*

Individual level variable	WOMAC pain at 2 years		WOMAC Function at 2 years
	Estimate (Standard error)	p value	Estimate (standard error)	p value
Age at surgery	0.02 (0.03)	0.51	−0.11 (0.03)	<0.0001
Sex (female versus. male)	−0.55 (0.55)	0.32	−0.33 (0.54)	0.55
BMI	0.01 (0.05)	0.77	−0.06 (0.05)	0.17
Race (black versus white)	−5.20 (1.34)	<0.0001	−6.45 (1.34)	<0.0001
Education (no college versus college or above)	−3.26 (0.56)	<0.0001	−2.14 (0.56)	0.0001
Charlson-Deyo comorbidities (≥1 versus 0)	−0.55 (0.59)	0.36	−0.76 (0.60)	0.20
WOMAC pain at baseline	0.21 (0.02)	<0.0001	-	-
WOMAC function at baseline	-	-	0.28 (0.02)	<0.0001

^*WOMAC=Western Ontario and McMaster Universities Osteoarthritis Index; BMI=body mass index.