Liver cirrhosis in Malaysia: Peculiar epidemiology in a multiracial Asian country

BACKGROUND AND AIM: To determine the etiology of liver cirrhosis and risk factors for hepatocellular carcinoma (HCC) in a multiracial Asian population. METHODS: Consecutive patients with liver cirrhosis presenting to outpatient clinics and inpatient service at the University of Malaya Medical Centre from 1 April 2006 to 31 May 2009 were included. RESULTS: A total of 460 patients were included in the study: 317 male patients (68.9%) and 143 female patients (31.1%), with a mean age of 58.8years (range: 15-87years). The major causes of cirrhosis were: chronic hepatitis B, n=212, 46.1%; chronic hepatitis C, n=85, 18.5%; cryptogenic, n=71, 15.4%; alcohol, n=58, 12.6% and autoimmune, n=9, 2.0%. Alcohol was the main etiology in Indians (51.1%) compared to Malay (0%) and Chinese (4.4%) (both P<0.001). Hepatitis B was the predominant etiology in Malay (47.9%) and Chinese (58.8%) compared to Indians (5.6%) (both P<0.001). Hepatitis C cirrhosis was highest in Malays (25.0%). 136 patients (29.6%) had concurrent HCC. Male sex (P<0.001), age>60years (P=0.014), hepatitis B (P<0.001), hepatitis C (P=0.006) and cryptogenic cause (P=0.002) were found to be independent risk factors for HCC. CONCLUSIONS: The etiology of cirrhosis has a peculiar pattern based on racial differences in alcohol intake and in the prevalence of hepatitis B.