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Abstract Title:

Changes in the prevalence of the most common causes of chronic liver diseases in the United States from 1988 to 2008.

Abstract Source:

Clin Gastroenterol Hepatol. 2011 Jun;9(6):524-530.e1. Epub 2011 Mar 25. PMID: 21440669

Abstract Author(s):

Zobair M Younossi, Maria Stepanova, Mariam Afendy, Yun Fang, Youssef Younossi, Hesham Mir, Manirath Srishord

Article Affiliation:

Center for Liver Diseases, Inova Fairfax Hospital, Falls Church, Virginia; Betty and Guy Beatty Center for Integrated Research, Inova Health System, Falls Church, Virginia.

Abstract:

BACKGROUND & AIMS: Chronic liver diseases (CLDs) are major causes of morbidity and mortality worldwide. We assessed changes in the prevalence of different types of CLD in the United States.

METHODS: National Health and Nutrition Examination Surveys conducted between 1988 and 2008 were used to estimate changes in the prevalence and predictors of CLDs. Serologic and clinical data were used to establish the diagnoses of CLDs in 39,500 adults. Statistical analyses were conducted with SUDAAN 10.0 (SAS Institute, Inc, Cary, NC).

RESULTS: The prevalence rates for CLD were 11.78% (1988-1994), 15.66% (1999-2004), and 14.78% (2005-2008). During the same period, the prevalence of hepatitis B virus infection (0.36%, 0.33%, and 0.34%), hepatitis C virus (1.95%, 1.97%, and 1.68%), and alcoholic liver disease (1.38%, 2.21%, and 2.05%) remained generally stable. In contrast, the prevalence of nonalcoholic fatty liver disease (NAFLD) increased from 5.51% to 9.84% to 11.01%. From 1988 to 1994, NAFLD accounted for 46.8% of CLD cases; from 1994 to 2004 its prevalence increased to 62.84%, and then to 75.1% from 2005 to 2008. During these time periods, steady increases were observed in obesity (21.74%, 30.02%, and 33.22%), visceral obesity (35.18%, 48.16%, and 51.43%), type II diabetes (5.55%, 7.88%, and 9.11%), insulin resistance (23.29%, 32.50%, and 35.00%), and hypertension (22.68%, 33.11%, and 34.08%). A multivariate analysis showed that during all time periods, obesity was an independent predictor of NAFLD.

CONCLUSIONS: National Health and Nutrition Examination Surveys data collected from 1988 to 2008 show that the prevalence of major causes of CLD remained stable, except for NAFLD, which increased steadily, along with the prevalence of metabolic conditions. Given the increasing rates of obesity, NAFLD prevalence is expected to contribute substantially to the burden of CLD in the United States.

Study Type : Human Study

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