Non-classical phenotypes of autoimmune hepatitis and advances in diagnosis and treatment

Table 3 Simplified scoring system of the International Autoimmune Hepatitis Group[65]

Variable	Result	Points
Autoantibodies
ANA or SMA	≥ 1:40	+1
ANA or SMA	≥ 1:80	+2
Antibodies to liver kidney microsome type 1	≥ 1:40	+2
Antibodies to soluble liver antigen	Positive	+2
Immunoglobulin level
Immunoglobulin G	> UNL	+1
	> 1.1 ULN	+2
Histological findings
Morphological features	Compatible	+1
	Typical	+2
Viral disease
Absence of viral hepatitis	No viral markers	+2
Pretreatment aggregate score
Definite diagnosis		≥ 7
Probable diagnosis		6

ULN: Upper limit of normal.