Non-alcoholic fatty liver disease in 2015

Table 2 Non-alcoholic steatosis or non-alcoholic fatty liver disease activity score is determined by evaluating the steatotic and inflammatory activity

NAS	Steatosis	Ballooning	Inflammation, lobular
0	< 5% (0)	None (0)	None (0)
3	5%-33% (1)	Rare or few (1)	1–2 foci per 20 × field (1)
6	34%-66% (2)	Many (2)	2–4 foci/20 × field (2)
8	> 66% (3)	Many (2)	> 4 foci/20 × field (3)

NAS: Non-alcoholic steatosis.