Correlation between GFAP and PHES, MELD, IL-6, or ammonia. (A) Correlation between serum levels of GFAP and PHES. (B) Correlation between serum levels of GFAP and MELD. (C) Correlation between serum levels of GFAP and IL-6. (D) Correlation between serum levels of GFAP and ammonia. A two-tailed Spearman’s rank correlation coefficient (Spearman’s ρ) was used. GFAP, glial fibrillary acidic protein; MELD, model for end-stage liver disease; PHES, psychometric hepatic encephalopathy score; r, Spearman's ρ.