Serum ALB, TB, AST levels and PT were associated with total 25(OH)D levels of < 15 ng/mL, while no association was observed between serum 25(OH)D levels and age, sex, PLT count, ALT level, ALP level, IgG titer, ANA titer, AIH score, relapse frequency and cirrhosis. The gene discussed is ALB; the disease is autoimmune hepatitis.