Table 1.

Scoring standard of NAFLD activity

NAS (0–8 points)
1. Steatosis (0–3 points)
0	< 5%
1	5–33%
2	33–66%
3	> 66%
2. Lobular inflammation (0–3 points)
0	No foci
1	< 2 foci in 200 × vision
2	2–4 foci in 200 × vision
3	> 4 foci in 200 × vision
3. Ballooning (0–2 points)
0	None
1	Few
2	Many or prominent ballooning