. 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 3.

Unadjusted and adjusted linear regression models of WOMAC pain among participants with knee osteoarthritis who worked outside the home > 1 year (Subsample A).

Feature	Unadjusted model b^* (95% CI)	Adjusted Model 1 b (95% CI)	Adjusted Model 2 b (95% CI)
African American race (vs white)	1.42 (0.72, 2.12)^†	1.35 (0.60, 2.09)^†	0.17 (−0.53, 0.88)
No. occupational tasks at longest job	—	0.21 (0.05, 0.37)	0.13 (−0.02, 0.29)
Age	—	—	0.00 (−0.03, 0.04)
Some college (vs no college)	—	—	−0.74 (−1.53, 0.05)
Female	—	—	1.55 (0.81, 2.28)^†
BMI	—	—	0.11 (0.06, 0.16)^†
Depressive symptoms	—	—	0.17 (0.12, 0.21)^†
Knee injury (vs no knee injury)	—	—	1.13 (0.19, 2.07)^†
K-L grade of worse knee	—	—	1.08 (0.63, 1.53)^†
Model R²	0.019	0.027	0.229

Unstandardized parameter estimate.

^†

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