Table 1.

NAS scoring standard.

Histological marker	Score	Scoring standard
Steatosis	0	<5%
	1	5%–33%
	2	34%–66%
	3	>66%
Hepatocyte ballooning	0	None
	1	Few; inapparent
	2	Easily noted; many
Lobular inflammation	0	None
	1	<2
	2	2–4
	3	>4