. 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 5.

MultivariateAnalysis for Pain or Function Two Years After Surgery^*

	WOMAC Pain at 2 years Estimated Coefficient (95% CI)	WOMAC Function at 2 years Estimated Coefficient (95% CI)
Age	−0.10 (−0.17, −0.02)^***	0.04 (−0.03, 0.12)^***
Female vs. Male	1.47 (−0.02, 2.96)	0.83 (−0.60, 2.26)^**
RA vs. OA	−3.32 (−8.20, 1.56)^***	−0.61 (−5.18, 3.96)^***
≥College education vs. <College	−1.56 (−3.09, −0.04)	−1.36 (−2.81, 0.08)^**
Caucasian vs. Non-Caucasian	−3.49 (−5.90, −1.07)	−3.93 (−6.21, −1.65)^**
Pre-Op WOMAC Pain	0.09 (0.02, 0.16)^**	−0.04 (−0.11, 0.02)
Pre-Op WOMAC Function	0.04 (−0.04, 0.11)	0.18 (0.11, 0.26)^**
Pre-Op PCS	−0.13 (−0.24, −0.01)	−0.24 (−0.35, −0.14)^**
Pre-Op MCS	−0.16 (−0.23, −0.10)^**	−0.24 (−0.31, −0.18)^**
Back Pain vs. No Back Pain	2.83 (1.35, 4.31)	1.78 (0.38, 3.19)

Multivariate linear regression controlling for age, gender, diagnosis, education, race, pre-operative WOMAC pain score, pre-operative WOMAC function score, pre-operative PCS, pre-operative MCS and previous back pain

^**

Variables with p-value<0.05 in the multivariate regression

^***

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

Bolding indicates a significant value