Number

Percent

Serum zinc

Mean ± SD

Range

1) No clinical evidence of HE

30

No HE

17

56.67

0.36 ± 0.20

0.11 - 0.67

MHE

13

43.33

0.25+0.19

0.10 - 0.81

2) Overt HE

25

Grade 1

8

32

0.17 ± 0.14

0.04 - 0.40

Grade 2

5

20

0.15 ± 0.09

0.04 - 0.3

Grade 3

6

24

0.08 ± 0.02

0.06 - 0.09

Grade 4

6

24

0.07 ± 0.03

0.03 - 0.10

Healthy controls

30

0.68 ± 0.37

0.20 - 1.40