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.