Baseline characteristics by treatment group
| All patients | Patients with a complete set of x-rays | |||
|---|---|---|---|---|
| Continuous use (n=111) | On-demand use (n=103) | Continuous use (n=76) | On-demand use (n=74) | |
| Age, mean ±SD (years) | 38.0±10.7 | 40.1±10.5 | 40.9±9.8 | 37.9±11.9 |
| Male (%) | 67 | 72 | 66 | 70 |
| Disease duration, mean ±SD (years) | 11.9±9.3 | 11.0±9.4 | 13.0±10.2 | 10.2±9.3 |
| Human Leukocyte Antigen B27 (HLA-B27) positive (%) | 86 | 87 | 88 | 88 |