Risk of nonalcoholic steatohepatitis and fibrosis in patients with nonalcoholic fatty liver disease and low visceral adiposity

Anna Ludovica Fracanzani, Luca Valenti, Elisabetta Bugianesi, Ester Vanni, Antonio Grieco, Luca Miele, Dario Consonni, Erika Fatta, Rosa Lombardi, Giulio Marchesini, Silvia Fargion

Research output: Contribution to journalArticle

Abstract

Background & Aims: Increased visceral adiposity is considered the hallmark of the metabolic syndrome, whose hepatic manifestation is nonalcoholic fatty liver disease (NAFLD), although a subset of patients does not have visceral obesity. Our study aimed to compare metabolic alterations and liver damage in patients with NAFLD with and without visceral obesity. Methods: Four hundred and thirty one consecutive patients with liver biopsy-confirmed NAFLD were divided in three groups according to waist circumference, the simplest surrogate marker of visceral obesity. One hundred and thirty three patients (31%) had a waist circumference ≤94 (males) and ≤80 cm (females) (group A), 157 (36%) between 94 and 102, and 80 and 88 (B), and the remaining 141 (33%) had values higher than 102 and 88 cm (C). Results: Significant trends for older age, higher prevalence of female gender, lower HDL, higher triglycerides, altered glucose metabolism, hypertension, and metabolic syndrome were observed with increasing visceral adiposity. In contrast, non-alcoholic steatohepatitis (NASH) detected in 55% and 72% of patients with normal and increased waist circumference, respectively, and the presence of fibrosis ≥2 were not associated with visceral adiposity. Alanine aminotransferase (ALT), ferritin, HOMA-IR >4, and severe steatosis were independently associated with NASH, whereas ferritin and impaired glucose tolerance were associated with fibrosis ≥2. Conclusions: Patients with normal waist circumference, despite milder metabolic alterations, may have NASH and are at risk of developing fibrosis, suggesting that once NAFLD is present, visceral obesity is not a major determinant of liver damage severity.

Original languageEnglish
Pages (from-to)1244-1249
Number of pages6
JournalJournal of Hepatology
Volume54
Issue number6
DOIs
Publication statusPublished - Jun 2011

Keywords

  • Abdominal obesity
  • Glucose metabolism
  • NAFLD
  • NASH
  • Waist circumference

ASJC Scopus subject areas

  • Hepatology

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