| Characteristic | Whole Cohort | PHQ2 score <3 | PHQ2 score ≥3 | p value |
|---|---|---|---|---|
| N=385 | n=263 | n=122 | ||
| Age, mean (SD) | 54 (15) | 54 (15) | 55 (14) | 0.768 |
| Female, n (%) | 305 (79) | 207 (79) | 98 (80) | 0.681 |
| Seropositive, n (%) | 261 (73)* | 175 (72)* | 86 (76)* | 0.705 |
| Disease duration, mean (SD) | 6.6 (8.0) | 6.0 (7.0) | 8.0 (10.0) | 0.118 |
| DAS28, mean (SD) | 4.0 (1.7) | 3.6 (1.6) | 4.7 (1.6) | <0.001 |
| HAQ, mean (SD) | 1.3 (0.9) | 1.0 (0.8) | 1.9 (0.7) | <0.001 |
| Work ability, mean (SD)** | 3.1 (2.9) | 2.1 (2.4) | 5.1 (2.6) | <0.001 |
| Univariate regression | ||||
| Beta coefficient (95% CI) | Ref | 2.94 (2.40 to 3.50) | <0.001 | |
| Multivariate regression*** | 1.40 (0.84 to 1.96) | <0.001 | ||
*Missing data on serostatus in 28 subjects. **Work ability on scale 0–8 from WSAS scale. ***Adjusted for age, gender, disease duration, HAQ and DAS score.