[Minimal hepatic encephalopathy: a better diagnostic to improve prognostic].

Background And Aims: Minimal hepatic encephalopathy (MHE) is the mildest form of the spectrum of hepatic encephalopathy that impairs health-related quality of life. The aim of this study is to evaluate the prevalence of MHE in patients with liver cirrhosis and analyze risk factors.

Methods: Between September 2011 and December 2012, consecutive cirrhotic patients seen in our department were evaluated. Patients included were screened by the psychometric hepatic encephalopathy score (PHES) battery comprising 5 tests: number connection test A and B, line tracing test, serial dotting test and digit symbol test. Patients included were regularly followed-up for the development of overt hepatic encephalopathy, driving accidents, falls and death.

Results: We included 45 cirrhotic patients. Etiology of cirrhosis was viral in half of cases. Child-Pugh score was A in 55.6 %, B in 26.7 % and C in 17.8 %. Median Meld score was 14. According to the PHES score, MHE was detected in 44.4 % of patients. Univariate analysis identified 4 variables significantly associated with the presence of MHE: age ≥ 55 years (P=0.031), poor educational status with years of study< 9 years (P=0.007), MELD score ≥ 15 (P=0.002) and Child-Pugh ≥ 7 (P=0.001). At multivariate analysis, the only independent risk factor of MHE was a MELD score≥15 (OR=15.4; P<0.001). During the follow-up, patients with MHE developed more often overt encephalopathy, falls and driving accidents, and had a lower survival, although the difference was not statically significant.

Conclusion: In this preliminary small series, prevalence of MHE in Tunisian cirrhotic patient was 44.4 %. A MELD score ≥ 15 was the only independent risk factor. MHE had a negative impact on the outcome, justifying an early diagnostic. Adequate therapy may improve cognitive function.