Clinical features are compared between men and women with ankylosing spondylitis from the Prospective Study of Outcomes in Ankylosing Spondylitis cohort
| Men (n = 302) | Women (n = 100) | p Value | |
|---|---|---|---|
| *1–3 light to heavy. | |||
| AS, ankylosing spondylitis; HLA, human leucocyte antigen. | |||
| Age, years | 55.5 (10.6) | 53.0 (11) | 0.04 |
| Mean (SD) age at onset, years | 23.6 (7.9) | 21.5 (7.3) | 0.03 |
| Mean (SD) duration of AS, years | 32.0 (9.9) | 31.5 (10.1) | 0.67 |
| Family history | 24.6% | 41.0% | 0.002 |
| Smoking status | |||
| Current | 11.6% | 8% | 0.003 |
| Former | 49.0% | 33.0% | |
| Never | 39.4% | 59.0% | |
| Mean (SD) education level, years | 16.0 (3.1) | 15.9 (2.7) | 0.70 |
| Weighted occupational physical activity* | 1.8 (0.7) | 1.9 (0.7) | 0.61 |
| Married | 65.6% | 65.0% | 0.92 |
| Ethnicity | |||
| White | 88.1% | 87.0% | 0.79 |
| Black | 3.6% | 5.0% | |
| Asian/Pacific Islander | 1.7% | 3.0% | |
| Native American | 1.3% | 0% | |
| Hispanic | 4.9% | 4.0% | |
| Other | 0.3% | 1.0% | |
| HLA-B27-positive | 88.7% | 84.0% | 0.22 |