Nonalcoholic fatty liver disease in patients with hepatitis C is associated with features of the metabolic syndrome

Arun J Sanyal, Melissa J Contos, Richard K Sterling, Velimir A Luketic, Mitchell L Shiffman, R Todd Stravitz, A Scott Mills
American Journal of Gastroenterology 2003, 98 (9): 2064-71

OBJECTIVES: The objectives of this study were to determine the following: 1) whether chronic hepatitis C virus (HCV) infection was specifically associated with nonalcoholic fatty liver disease (NAFLD); 2) the factors associated with NAFLD in patients with HCV; and 3) the clinical and histological spectrum of NAFLD occurring together with HCV.

METHODS: A retrospective analysis of 3826 biopsies was performed to compare the prevalence of NAFLD in those with HCV versus that in other liver diseases, e.g., hepatitis B, primary biliary cirrhosis, and alpha(1)-antitrypsin deficiency. Patients with HCV and NAFLD were also compared with an age- and gender-matched control group with HCV and <5% hepatic steatosis.

RESULTS: The prevalence of NAFLD in patients with HCV was similar to that in hepatitis B, primary biliary cirrhosis, or alpha(1)-antitrypsin deficiency. The risk of having NAFLD in patients with HCV correlated with body weight (r = 0.7, p < 0.02). Compared with a control group with HCV alone (n = 75), patients with HCV and NAFLD (n = 69) were likely to be heavier (mean BMI 27 vs 30, p < 0.003), diabetic (eight vs 21, p < 0.005), hypertensive (14 vs 25, p < 0.05), and hypertriglyceridemic (15 vs 33, p < 0.05). The HCV viral load, genotype distribution, liver enzymes, liver functions, and ferritin levels were comparable across the study groups. Those with HCV and NAFLD were more likely to have advanced fibrosis (bridging fibrosis or cirrhosis) (26% vs 53%, p < 0.03). Weight, diabetes, and cytological ballooning were independent predictors of advanced fibrosis in those with HCV and NAFLD.

CONCLUSIONS: The presence of NAFLD in patients with HCV is strongly associated with features of the metabolic syndrome and is a risk factor for advanced fibrosis. Advanced fibrosis in such patients is related to weight, presence of diabetes, and presence and degree of cytological ballooning.

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