SAA levels were measured and compared in a AAU patients and HC; b B27−AAU patients, B27+AAU patients, and HC; c AS−AAU patients, AS+AAU patients, and HC. *p < 0.05, **p < 0.01, ***p < 0.001, AAU acute anterior uveitis, B27−AAU HLA-B27-negative AAU, B27+AAU HLA-B27-positive AAU, AS−AAU AAU without AS, AS+AAU AAU with AS, HC healthy controls. All p values were calculated using the Mann–Whitney U-test.