Characteristics | EA population N = 701 | Patients fulfilling RA classification criteria N = 568 | IBP population N = 646 | Patients fulfilling ASAS classification criteria N = 402 |
---|---|---|---|---|
Age (years), mean (SD) | 48.4 (12.2) | 48.9 (12.0) | 33.9 (8.7) | 31.7 (7.3) |
Symptom duration (month), mean (SD) | 3.4 (1.7) | 3.3 (1.7) | 18.2 (10.8) | 18.2 (10.8) |
Sex, females, N (%) | 535 (76.3) | 433 (76.2) | 355 (55.0) | 197 (49.0) |
Studies above high school, N (%) | 230 (32.8) | 180 (31.7) | 391 (60.7) | 259 (64.4) |
Work status: intermediate/high level employment, N (%) | 532 (75.9) | 434 (76.4) | 494 (77.1) | 291 (72.9) |
Smoking status, yes, N (%) | 326 (46.5) | 263 (46.3) | 225 (35.0) | 152 (37.9) |
HAQ, mean (SD) | 0.98 (0.69) | 1.05 (0.69) | 0.67 (0.51) | 0.57 (0.49) |
DAS28-ESR/ASDAS-CRP, mean (SD) | 5.12 (1.30) | 5.37 (1.23) | 2.62 (0.93) | 2.61 (0.99) |
SF36-PCS, mean (SD) | 38.5 (8.5) | 37.8 (8.3) | 40.2 (9.1) | 40.6 (9.0) |
SF36-MCS, mean (SD) | 39.8 (10.9) | 39.5 (10.7) | 40.4 (11.2) | 41.0(11.4) |