Abstract:
BACKGROUND & AIMS:This study investigated whether obesity, diabetes, and other metabolic factors are independently associated with hepatocellular carcinoma (HCC), stratified by hepatitis B virus (HBV) and hepatitis C virus (HCV) serostatus, and explored the possible joint influence of obesity/diabetes and HBV/HCV infections on the risk of HCC. METHODS:A total of 23,820 residents in Taiwan were recruited and followed up for 14 years. All analyses were stratified by hepatitis B surface antigen (HBsAg) and antibody to HCV (anti-HCV) at enrollment, and 218 subjects positive for both seromarkers were excluded. Incident HCC cases were identified via linkage to the national cancer registry. Multivariate-adjusted relative risk (RR(a)) and 95% confidence interval (95% CI) were estimated using Cox proportional hazards models. RESULTS:Extreme obesity (body mass index >or=30 kg/m(2)) was independently associated with a 4-fold risk of HCC (RR(a), 4.13; 95% CI, 1.38-12.4) among anti-HCV-seropositive subjects and a 2-fold risk (RR(a), 2.36; 95% CI, 0.91-6.17) in persons without HBV and HCV infections, after controlling for other metabolic components, but not in HBsAg-seropositive subjects (RR(a), 1.36; 95% CI, 0.64-2.89). Diabetes was associated with HCC in all 3 groups, with the highest risk in those with HCV infection (RR(a), 3.52; 95% CI, 1.29-9.24) and lowest in HBV carriers (RR(a), 2.27; 95% CI, 1.10-4.66). We found more than 100-fold increased risk in HBV or HCV carriers with both obesity and diabetes, indicating synergistic effects of metabolic factors and hepatitis. CONCLUSIONS:The finding that both obesity and diabetes are predictors of HCC risk, possibly differently depending on HBV and HCV infection status, may shed some light in preventing HCC.
journal_name
Gastroenterologyjournal_title
Gastroenterologyauthors
Chen CL,Yang HI,Yang WS,Liu CJ,Chen PJ,You SL,Wang LY,Sun CA,Lu SN,Chen DS,Chen CJdoi
10.1053/j.gastro.2008.03.073subject
Has Abstractpub_date
2008-07-01 00:00:00pages
111-21issue
1eissn
0016-5085issn
1528-0012pii
S0016-5085(08)00569-6journal_volume
135pub_type
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