ALB and autoimmune hepatitis: Furthermore, when the relationship between the percentage of free 25(OH)D and clinical presentation in patients with AIH was evaluated, the percentage of free 25(OH)D in patients with AIH was found to be significantly positively correlated with the serum TB level (r = 0.4239, P = 0.0004) and the activity grade (r = 0.4163, P = 0.0008) and negatively correlated with the serum PT (r = -0.3518, P = 0.0044) and ALB level (r = -0.3137, P = 0.0146) (S3 Table).