Baseline characteristics of patients eligible for posthoc analysis.
| Demographics and Baseline Characteristics | BASDAI ≥ 4, n = 172 | BASDAI 2.8 to < 4, n = 35 | BASDAI < 2.8, n = 37 | Total AS Patients, n = 244 |
|---|---|---|---|---|
| Mean age, yrs, ± SD (range) | 41.9 ± 12.5 (18–72) | 44.7 ± 11.6 (20–69) | 39.1 ± 12.5 (23–69) | 41.9 ± 12.4 (18–72) |
| Males, n (%) | 117 (68.0) | 29 (82.9) | 27 (73.0) | 173 (70.9) |
| Mean time since first diagnosis, yrs, ± SD (range) | 8.8 ± 9.5 (0–49.2) | 10.1 ± 10.2 (0.1–37.9) | 8.7 ± 9.0 (0.2–36.5) | 9.0 ± 9.5 (0.0–49.2) |
| Mean CRP, mg/l, ± SD (range) | 18.4 ± 52.8 (0.3–660.0) | 27.7 ± 74.1 (0.3–426.0) | 18.3 ± 17.8 (1.0–60.6) | 19.7 ± 52.7 (0.3–660.0) |
| Median CRP, mg/l | 10.0 | 14.0 | 13.0 | 10.2 |
| CRP ≥ 5 mg/l | ||||
| Yes, n (%) | 75 (45.2) | 21 (65.6) | 18 (51.4) | 114 (48.9) |
| No, n (%) | 91 (54.8) | 11 (34.4) | 17 (48.6) | 119 (51.1) |
| Missing, n | 6 | 3 | 2 | 11 |
BASDAI: Bath Ankylosing Spondylitis Disease Activity Index; AS: ankylosing spondylitis; CRP: C-reactive protein.