Table 2 Patient characteristics
Disease duration | |||||
|---|---|---|---|---|---|
Characteristics | Total | <2 years | 2–10 years | >10 years | Percentage of data missing |
Number of patients (percentage) | 491 | 70 (14) | 174 (36) | 236 (48) | - |
Females/males, n (percentage) | 417/74 (85/15) | 50/10 | 150/24 | 206/30 | - |
Age at disease onset in years, mean (SD) | 57.4 (13.3) | 55.4 (16.8) | 54.8 (14.0) | 60.0 (11.0) | 2% |
Years of education, mean (SD) | 5.8 (4.3) | 6.0 (4.5) | 7.0 (4.7) | 4.8 (3.7) | 7% |
Family history of RA, n (percentage)a | 67/400 (14/81) | 8/62 | 18/152 | 41/183 | 5% |
Disease duration in years, mean (SD) | 12.7 (10.5) | - | - | - | 2% |
Number of previous DMARDs, mean (SD) | 2.3 (1.6) | 1.3 (1.1) | 2.1 (1.4) | 2.7 (1.8) | 2% |
Dose of prednisolone in milligrams, mean (SD) | 5.9 (3.7) | 6.1 (4.1) | 5.8 (3.8) | 5.8 (3.4) | 3% |
Biologics, n (percentage)a | 150/339 (30/69) | 4/65 | 53/121 | 150/85 | 1% |
Health Assessment Questionnaire score, mean (SD) | 1.18 (0.8) | 0.97 (0.7) | 1.04 (0.8) | 1.36 (0.9) | 6% |
DAS28, mean (SD) | 4.14 (1.5) | 4.4 (1.7) | 4.1 (1.5) | 4.0 (1.5) | 3% |
Submitted to joint surgery, n (percentage)a | 113/366 (23/74) | 1/68 | 21/152 | 91/143 | 3% |
Work disability, n (percentage)a | 282/200 (57/41) | 38/32 | 80/84 | 161/74 | 2% |
Systemic manifestations, n (percentage)a | 124/357 (25/73) | 8/62 | 32/141 | 81/154 | 2% |
Rheumatoid factor, n (percentage)a | 319/124 (65/25) | 44/22 | 106/52 | 166/48 | 10% |
Sharp/van der Heijde score, mean (SD) | 117.2 (77.8) | - | - | - | 34% |