. Author manuscript; available in PMC: 2014 May 22.

Published in final edited form as: J Rheumatol. 2011 Dec 1;39(2):337–344. doi: 10.3899/jrheum.110040

Table 4.

Unadjusted and adjusted linear regression models of WOMAC pain among participants with knee osteoarthritis and currently working (Subsample B).

Feature	Unadjusted Model b^* (95% CI)	Adjusted Model 1 b (95% CI)	Adjusted Model 2 b (95% CI)
African American race (vs white)	1.61 (0.42, 2.80)^†	1.19 (−0.08, 2.45)	0.26 (−0.99, 1.50)
No. current occupational tasks	—	0.35 (0.07, 0.63)^†	0.31 (0.04, 0.59)^†
Age	—	—	0.03 (−0.05, 0.10)
Some college (vs no college)	—	—	−0.22 (−1.51, 1.07)
Female	—	—	2.14 (0.94, 3.34)^†
BMI	—	—	0.01 (−0.08, 0.10)
Depressive symptoms	—	—	0.20 (0.11, 0.29)
Knee injury (vs no knee injury)	—	—	1.59 (0.02, 3.17)^†
K-L grade of worse knee	—	—	1.05 (0.17, 1.93)
Model R²	0.027	0.045	0.233

Unstandardized parameter estimate.

^†

p < 0.05. BMI: body mass index; K-L: Kellgren-Lawrence; WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index.