Characteristics of the total AS population and the subgroups with and without work disability (categorical variables).
| Variable | Total AS Population, n = 699 (%) | AS Patients with Work Disability, n = 179 (%) | AS Patients without Work Disability, n = 520 (%) | p* |
|---|---|---|---|---|
| Sex | ||||
| Male | 535 (77) | 156 (87) | 379 (73) | < 0.0001 |
| Female | 164 (23) | 23 (13) | 141 (27) | |
| HLA-B27 | ||||
| Positive | 527 (81) | 133 (81) | 394 (82) | 0.7 |
| Negative | 121 (19) | 32 (19) | 89 (18) | |
| Exercise | ||||
| Yes | 269 (38) | 82 (46) | 187 (36) | 0.057 |
| No | 429 (62) | 97 (54) | 332 (64) | |
↵* Chi-square test.