Features/parameter | Discriminator | score |
ANA or SMA+ | ≥1:40 | +1* |
ANA or SMA+ | ≥1:80 | +2 |
or LKM+ | ≥1:40 | +2 |
Or SLA/LP+ | Any titer | +2 |
IgG or gamma-globulin level | >upper limit of normal | +1 |
| >1.1 upper limit | +2 |
Liver histology (evidence of hepatitis ) | Compatible with AIH | +1 |
| Typical of AIH | +2 |
| Atypical | 0 |
Absence of hepatitis | No | 0 |
| Yes | +2 |