HLA-DRB1 and autoimmune hepatitis: As shown in Table 4, the prevalence of valine at position 11 (P = 1.4×10−6; OR = 2.19), histidine at position 13 (P = 1.3×10−7; OR = 2.38), and serine at position 57 (P = 2.3×10−8; OR = 2.53) in DRβ1 was significantly higher in patients with AIH compared with healthy subjects.