Demographics and clinical data of low-grade HE patients and healthy controls.

Quantitative values are expressed as mean ± SD (standard deviation). M = male; F = female; HC = healthy control; HE = hepatic encephalopathy. NCT-A = number connecting-A; DST = digit symbol test; - = unavailable data.aThe P value for gender distribution in the two groups was obtained by chi-square test.bThe P value for age and neuropsychological tests difference between the two patients groups was obtained by two sample t test.