Demographic and clinical characteristics of patients with ankylosing spondylitis (n = 134)
| Characteristic | Frequency | |
|---|---|---|
| *Mean (SD) (range). | ||
| †Median (interquartile range). | ||
| AS, ankylosing spondylitis. | ||
| Age (years)* | 50.9 (12.9) (19 to 79) | |
| Age at first complaints (years)† | 23.0 (19.0 to 31.5) | |
| Age at diagnosis (years)* | 34.7 (10.6) (16 to 63) | |
| Years between first complaints and diagnosis† | 7.0 (2.0 to 12.5) | |
| Women | 18.7% | |
| HLA-B27 positive | 94% | |
| Iridocyclitis | 43% | |
| Peripheral arthritis | 41% | |
| First degree relatives with AS | 28% | |