Abstract
Posttransplant diabetes mellitus (PTDM), an increasingly recognized complication of solid organ transplantation, is associated with increased morbidity and mortality following liver transplantation (LT). Hepatitis C virus (HCV) infection is a consistent and modifiable risk factor for PTDM. Prior studies have demonstrated improvement in glucose metabolism following sustained virological response (SVR). However, the effect of SVR on the incidence of PTDM has not been previously investigated in a large cohort of LT recipients. We performed a single-center retrospective cohort study of LT recipients with HCV from January 1, 2010 to June 30, 2015 to compare the risk of sustained posttransplant diabetes mellitus (s-PTDM) prior to and following SVR. SVR was treated as a discrete time varying exposure. The s-PTDM was defined as de novo diabetes mellitus following LT of a >6-month duration. Univariate and multivariate Cox proportional hazards models were used to compare crude and adjusted time to s-PTDM prior to and following SVR. There were 256 eligible LT recipients analyzed. Median follow-up was 41.2 months. Overall, 31 (12.1%) and 178 (69.5%) patients achieved SVR prior to LT and following LT, respectively. During follow-up, 71 (27.7%) patients developed s-PTDM. The incidence of s-PTDM was greatest in the first year after LT. After adjustment for potential confounders, SVR was associated with a significantly reduced risk of s-PTDM (HR, 0.40; P = 0.048). In conclusion, eradication of HCV is independently associated with a reduced incidence of s-PTDM. This benefit appears to be most influenced by pre-LT SVR and persists throughout the post-LT period. Given the association between PTDM and posttransplant morbidity and mortality, these data provide another motivator for pre-LT or early post-LT treatment of HCV.
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