Frequency

Percent

Age (mean ± SD)

47.5 ± 6.8

Sex

Male

28

46.7%

Female

32

53.3%

Educational level

Illeterate

34

56.7%

Primary school

8

13.3%

Middle school

16

26.7%

High school

2

3.3%

Minimental state examination

Normal

38

63.3%

Cognitive impairment

22

36.7%

MMSE (mean ± SD)

22.19 ± 3.772

EEG

Normal (grade 1 - 2)

31

51.7%

Theta slowing (grade 3)

10

16.7%

Delta slowing (grade 4)

12

20.0%

Triphasic wave (grade 5)

7

11.7%

P100 latency

P100 latency right eye (mean ± SD)

122.3 ± 29.6

P100 latency left eye (mean ± SD)

121.25 ± 25.5

Abnormal P100 latency

31 (51.7%)

Child Pouph score

A

31

51.7%

B

21

35.0%

C

8

13.3%

Minimal hepatic encephalopathy

MHE diagnosed by MMSE

22 (36.7%)

MHE diagnosed by EEG

29 (48.3%

MHE diagnosed by VEP

31 (51.7%)