Fig. 4
From: Anti-SIRT1 autoantibody is elevated in ankylosing spondylitis: a potential disease biomarker
Serum levels of anti-SIRT1 antibodies in AS patients with hip joint involvement, various durations of disease and ESR levels. a. Serum anti-SIRT1 antibodies in AS patients without hip joint involvement and with involvement duration of < 1 year, 1–10 years and > 10 years from symptom onset. b. Serum anti-SIRT1 antibody levels in patients with AS duration of < 1 year, 1–10 years, 11–20 years and > 20 years from symptom onset. c. No significant differences in serum anti-SIRT1 antibody levels in ESR-positive and ESR-negative groups were found. *** P < 0.001