Differences between ASAS axSpA features (excluding imaging) reported in referral letter versus reported during diagnostic workup at baseline of SPACE
| Referral parameters | Referral letter (%)a | SPACE (%)a | Delta % b |
|---|---|---|---|
| Inflammatory back pain (IBP) | 3 (1.5%) | 128 (62.7%) | −61.2% |
| Good response NSAID | 7 (3.4%) | 62 (30.4%) | −27% |
| Family history | 21 (10.3%) | 68 (33.3%) | −23% |
| HLA-B27 positive | 25 (12.3%) | 66 (32.4%) | −20.1% |
| Increased CRP/BSE | 9 (4.4%) | 37 (18.1%) | −13.7% |
| Arthritis | 8 (3.9%) | 25 (12.3%) | −8.4% |
| Heel pain | 6 (2.9%) | 21 (10.3%) | −7.4% |
| Psoriasis | 6 (2.9%) | 20 (9.8%) | −6.9% |
| Uveitis | 9 (4.4%) | 15 (7.4%) | −3% |
| Dactylitis | 1 (0.5%) | 5 (2.5%) | −2% |
| Inflammatory bowel disease (IBD) | 10 (4.9%) | 13 (6.4%) | −1.5% |