Demographic data of study subjects
| AS+ | AS− | p Value | Total | |
| AAU patients | 581 | 475 | N/A | 1056 |
| Male | 437 (75.2%) | 246 (51.8%) | <0.001*** | 683 |
| Female | 144 (24.8%) | 229 (48.2%) | 373 | |
| Eyes studied | 883 | 642 | N/A | 1525 |
| OD/OS | 432/451 | 332/310 | N/A | 764/761 |
| Bilateral involvement | 275 (47.3%) | 174 (36.6%) | 0.001** | 449 |
| Unilateral involvement | 306 (52.7%) | 301 (63.4%) | 607 |
*p<0.05, **0.001≤p≤0.01, ***p<0.001.
AAU, acute anterior uveitis; AS, ankylosing spondylitis; OD/OS, oculus dexter/oculus sinister; N/A, not applicable.