Table 1.
Non-alcoholic fatty liver disease activity scoring system[121]
| Steatosis, grade (0-3) | |
| < 5% | 0 |
| 5%-33% | 1 |
| 34%-66% | 2 |
| > 66% | 3 |
| Lobular inflammation | |
| No foci | 0 |
| < 2 foci per 200 × field | 1 |
| 2-4 foci per 200 × field | 2 |
| > 4 foci per 200 × field | 3 |
| Hepatocyte ballooning | |
| None | 0 |
| Few balloon cells | 1 |
| Many cells/prominent ballooning | 2 |
| Fibrosis stage | |
| None | 0 |
| Perisinusoidal or periportal | 1 |
| Mild, zone 3, perisinusoidal | 1A |
| Moderate, zone 3, perisinusoidal | 1B |
| Portal/periportal | 1C |
| Perisinusoidal and portal/periportal | 2 |
| Bridging fibrosis | 3 |
| Cirrhosis | 4 |