Table 2.

Multivariate model of predictors of depression^*

Characteristic	GEE coefficient (95% CI)	P
Men	Reference
Women	−0.13 (−1.4, 1.1)	0.84
Age, years	−0.02 (−0.05, 0.03)	0.47
University hospital, HAQ score
First quartile	Reference
Second quartile	2.8 (1.7, 3.9)	<0.0001
Third quartile	4.7 (3.4, 6.0)	<0.0001
Fourth quartile	9.1 (6.8, 11.3)	<0.0001
Public hospital, HAQ score
First quartile	0.99 (−0.08, 2.1)	0.07
Second quartile	3.3 (2.1, 4.6)	<0.0001
Third quartile	7.0 (5.8, 8.3)	<0.0001
Fourth quartile	11.7 (9.8, 13.7)	<0.0001
Disease duration, years	−0.02 (−0.07, 0.03)	0.37
DMARD†
No	Reference
Yes	−0.47 (−1.6, 0.66)	0.42
Prednisone	−0.39 (−1.3, 0.55)	0.41

^*GEE = generalized estimating equation; 95% CI = 95% confidence interval; HAQ = Health Assessment Questionnaire; DMARD = disease-modifying antirheumatic drug.

^†Includes any DMARD other than prednisone.