Table 2.

Results of logistic regression evaluating associations between symptomatic joint count and depression.

Predictor variable	Reference value	Contrast value	Odds ratio	95% confidence interval
Age in years	—	—	0.96	0.93, 0.99
Sex	Male	Female	4.24	1.74, 10.35
Education	Some formal education beyond high school	No formal education beyond high school	1.05	0.50, 2.23
Surgical joint	Hip	Knee	0.70	0.34, 1.45
Body mass index	—	—	1.04	0.99, 1.09
Number of comorbidities	—	—	1.50	1.15, 1.85
WOMAC pain score	—	—	0.89	0.76, 1.05
WOMAC function score	—	—	1.02	0.97, 1.07
Number of symptomatic joints	—	—	1.19	1.08, 1.31

WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index.