Baseline characteristics of the DESIR cohort
| All (n=708) | ||
|---|---|---|
| Count | Per cent | |
| Age, sex, ethnicity | ||
| Age group <25 | 133 | 18.8 |
| Age group ≥25 and <55 | 572 | 80.1 |
| Age group ≥50 | 3 | 0.4 |
| Male | 327 | 46.2 |
| Caucasian | 634 | 89.6 |
| Highest level of education | ||
| High school or less | 286 | 40.4 |
| Post-secondary school | 418 | 59 |
| Profession* | ||
| Agriculturer | 6 | 0.9 |
| Artisan, retailer or small business owner | 35 | 4.9 |
| Executive or academic | 151 | 21.3 |
| Intermediate professional | 54 | 7.7 |
| Employee | 299 | 42.6 |
| Tradesperson | 64 | 9 |
| Without professional occupation | 93 | 13.3 |
| Clinical characteristics | ||
| Early onset (<17 years) | 13 | 1.8 |
| Late onset (>44 years) | 72 | 10.2 |
| Presence of extra-articular manifestations | 188 | 26.6 |
| Uveitis | 60 | 8.5 |
| Psoriasis | 112 | 15.8 |
| Crohn's disease | 18 | 2.5 |
| HLA B27 positive | 410 | 57.9 |
| ASAS criteria (total): positive | 486 | 68.6 |
| ASAS clinical criteria: positive | 404 | 57.1 |
| ASAS imaging criteria: positive | 286 | 40.4 |
| Clinical values | Mean | SD |
| Disease duration in years | 1.5 | 0.9 |
| Physician's assessment of disease activity (0–10) | 4.3 | 2.2 |
| BASDAI score (0–100) | 44.7 | 20 |
| BASFI score (0–100) | 30.4 | 22.8 |
*Per cent values do not total 100 due to missing baseline data.
ASAS, the Assessment of SpondyloArthritis international Society.