. Author manuscript; available in PMC: 2017 Jan 1.

Published in final edited form as: J Rheumatol. 2015 Dec 1;43(1):46–53. doi: 10.3899/jrheum.150525

Table 4.

Univariate Analysis for Pain or Function Two Years After Surgery^*

	WOMAC Pain at 2 years Estimated Coefficient (Standard Error)	WOMAC Function at 2 years Estimated Coefficient (Standard Error)
Age	−0.12 (−0.19, −0.05)^***	0.03 (−0.04, 0.10)^***
Female vs. Male	2.98 (1.63, 4.33)^**	3.29 (1.92, 4.67)^**
RA vs. OA	−0.22 (−4.59, 4.14)^***	1.85 (−2.57, 6.26)^***
ASA Class 2 vs.ASA Class 1	2.07 (−1.31, 5.45)	3.51 (0.06, 6.96)
ASA Class 3+vs. ASA Class 1	3.32 (−0.26, 6.90)	6.85 (3.19, 10.52)
≥1 Deyo Comorbidities vs. 0 Deyo Comorbidities	0.64 (−0.85, 2.13)	1.76 (0.23, 3.28)
BMI	0.09 (−0.02, 0.20)	0.19 (0.08, 0.30)
≥College education vs. <College	−3.70 (−5.09, −2.31)^**	−3.94 (−5.36, −2.52)^**
Caucasian vs. Non-Caucasian	−4.68 (−6.91, −2.45)^**	−4.93 (−7.20, −2.66)^**
Pre-Op WOMAC Pain	0.21 (0.17, 0.24)^**	0.18 (0.15, 0.22)^**
Pre-Op WOMAC Function	0.21 (0.17, 0.25)^**	0.26 (0.22, 0.30)^**
Pre-Op PCS	−0.32 (−0.41, −0.24)^**	−0.43 (−0.52, −0.35)^**
Pre-Op MCS	−0.27 (−0.33, −0.21)^**	−0.34 (−0.39, −0.28)^**
Previous Replacement vs. No Prev Replacement	−0.41 (−2.03, 1.22)	0.82 (−0.85, 2.48)
Back Pain vs. No Back Pain	4.55 (3.20, 5.89)^**	4.41 (3.04, 5.79)^**
Expectation Score	−0.03 (−0.07, 0.01)	−0.05 (−0.09, −0.002)

Univariate linear regression controlling for each individual predictor as listed in the table

^**

Variables with p-value<0.05 in the univariate analysis and included in the multivariate regression

^***

Variables with p-value>0.05 in the univariate analysis; included in the multivariate regression based on the research of interest

Bolding indicates a significant value