Forreasons not yet determined, chronic liver disease (CLD) has been a leading cause of excess morbidity and mortality in central Harlem. We conducted a case series and case-control analysis of demographic, clinical, epidemiological, and alcohol-intake-related information from patients with CLD and age-and sex-matched hospitalized control patients. Patients' sera were tested for markers of viral hepatitis. The presumed etiology of CLD among casepatients was as follows: both alcohol abuse and hepatitis C virus (HCV) infection, 24 persons (46% of case-patients); alcohol abuse alone, 15 (29%); HCV infection alone, 6 (12%); both alcohol abuse and chronic hepatitis B virus (HBV) infection, 3 (6%); and 1 each (2%) from: 1) schistosomiasis, 2) sarcoidosis, 3) unknown causes, and 4) alcohol abuse, chronic HBV, and HCV combined. In the case-control analysis, patients who had both alcoholism and either HBV (odds ratio Chronic liver disease (CLD) is an important cause of morbidity and mortality in the United States, 1,2 and although deaths from CLD have declined recently, the reason for this decrease has not been determined. 3,4 In central Harlem, the mortality rate for CLD is five times the national average, nearly twice the rate of the next-highest New York City community, 5 and in central Harlem during 1979 through 1981, it was the second leading cause of excess deaths. 6 Chronic infection with hepatitis B virus (HBV) or hepatitis C virus (HCV) is associated with the development of CLD. 7,8 In addition, persons who have hepatitis that is not caused by known viral etiologies of hepatitis (non-ABCDE hepatitis) are at risk for CLD, suggesting that the recently characterized hepatitis G virus (HGV) may cause CLD. [9][10][11] In the few population-based studies that have tried to define the etiology of CLD or cirrhosis, excess alcohol consumption was demonstrated to contribute to approximately 50% of cases. 12 However, such studies have not determined the relative contribution of HBV, HCV, or HGV infection to CLD in the United States. Furthermore, such studies have not evaluated areas such as central Harlem that experience a disproportionate burden of CLD morbidity and mortality.[In the United States, the estimated prevalence of chronic HBV infection is 0.3%, 13 and 1.8% of the population is infected with HCV. 14 For both HBV and HCV, the rate of infection is significantly higher in African-Americans and Hispanics than in whites. 13,15 To determine the relative contribution of consumption of alcohol and the various types of viral hepatitis to the elevated rates of CLD observed in central Harlem, we conducted a prospective, hospital-based, case-control study.
PATIENTS AND METHODSStudy Population. The study was conducted at Harlem Hospital Medical Center, which serves more than 60% of the CLD patients from central Harlem (New York State Department of Health, unpublished data, August, 1990). Case-patients were identified from August 1, 1991, through June 30, 1992, by review of: 1) the hospital' s admission and discharge rosters;...