Abstract

Associations between chronic hepatitis C virus (HCV) infection and chronic kidney disease (CKD) remain controversial. Here we aimed to clarify the association between HCV viral load, genotype, and CKD in 13,805 participants aged 30-65 years enrolled in the REVEAL-HCV Study, a community-based prospective study conducted in 1991-1992. CKD was defined by consecutive proteinuria oran estimated glomerular filtration rate (eGFR) under 60 mL/min/1.73 m2. Chronic HCV infection was defined by detectable HCV viral load. Logistic regression models were used to estimate prevalence odds ratio of CKD for chronic HCV infection after adjusting for other risk factors. Compared to non-chronically HCV-infected participants, the adjusted prevalence odds ratio (95% confidence interval) for CKD was significantly increased to 1.91 (1.27-2.88) for chronically HCV-infected participants. Compared to non-chronically HCV-infected participants, the adjusted prevalence odds ratio of CKD was 1.21 (0.54-2.70), 1.40 (0.66-3.00) and 3.44 (1.92-6.14) for chronically HCV-infected participants with low to high tertiles of serum HCV RNA, respectively. The adjusted prevalence odds ratios of CKD were 0.54 (0.17-1.75) for participants with low HCV RNA and genotype 1, 1.80 (0.84-3.87) for those with low HCV RNA and genotype 2, 2.62 (1.11-6.17) for those with high HCV RNA and genotype 1 and 4.99 (2.25-11.06) for those with high HCV RNA and genotype 2, compared with non-chronically HCV-infected participants. Thus, chronic HCV infection is associated with an increased risk of CKD. High HCV viral load and HCV genotype 2 are strong CKD predictors.

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