Journal
JOURNAL OF HEPATOLOGY
Volume 35, Issue 1, Pages 37-45Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0168-8278(01)00129-5
Keywords
electroencephalogram; spectral electroencephalogram analysis; cirrhosis; hepatic encephalopathy; survival
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Background/Aims: The electroencephalogram (EEG) is frequently altered in cirrhotic patients. We, therefore, performed a study to ascertain the features and the prognosis of cirrhotic patients without current overt hepatic encephalopathy (OHE) who have EEG alterations. Methods: A series of 296 consecutive cirrhotic patients who had undergone quantified-EEG was studied. The median follow-up was 442 days, 128 patients had bouts of OHE and 78 patients died from liver-related causes. Another group of 124 cirrhotic patients with a median follow-up of 223 days was examined to validate the prognostic model. Results: EEG alterations were detected in 38 % of the patients. The prevalence of EEG alterations was associated with the severity of cirrhosis (class B: odds ratio (OR) = 2.3, 95% confidence interval (CI) = 1.2-4.7; class C: OR = 3.5, 95% CI = 1.6-7.7), but not with the aetiology (alcoholic vs. non-alcoholic: OR = 0.9; 95% CI = 0.5-1.5), The EEG predicted the occurrence of OHE (chi (2) = 26; P < 0.001) and mortality (chi (2) = 34; P < 0.001), also adjusting for Child-Pugh class by a multivariate analysis. In the patients with a Child-Pugh score of greater than or equal to 8, the EEG discriminated between those patients with a higher 1-year risk of OHE (hazard ratio (HR) = 3.3, 95% CI = 1.8-6.1) and death (HR = 3.1, 95% CI = 1.7-5.6). Conclusions: In conclusion, quantified-EEG had a prognostic value for the occurrence of bouts of OHE and mortality in cirrhotic patients. (C) 2001 European Association for the Study of the Liver. Published by Elsevier Science B.V. All rights reserved.
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