General characteristics and biomicroscopic features | Idiopathic B27+ (n=63) | AS/SpA B27+ (n=9) | Idiopathic B27− (n=11) | Other uveitis entity B27− (n=5) |
Median age at onset (years) | 31 | 28 | 45 | 44 |
Male:female | 1.3:1 | 3.5:1 | 1.2:1 | 2:3 |
Recurrent (%) | 49 | 78 | 27 | 40 |
Fibrin exudate (%) | 43 | 56 | 55 | 60 |
Hypopyon (%) | 11 | 0 | 18 | 0 |
Fatty keratic precipitates (%) | 6 | 0 | 0 | 75 |
Patchy/sectorial iris atrophy | 0 | 0 | 0 | 60 |
Persistent posterior synechiae (%) | 22 | 22 | 18 | 40 |
↵Ankylosing spondylitis (AS) or other seronegative spondyloarthropathy (SpA).