Impact of SGLT2 inhibitors on liver-related outcomes in patients with heart failure - a population-based study in HK

Abstract Background Sodium-glucose cotransporter-2 (SGLT2) inhibitors are now recommended for heart failure with preserved ejection fraction (HFpEf). While their side effects on respiratory and renal outcomes in patients with type 2 diabetes have been studied, the impact on liver-related diseases within HF patients is not well-established. Purpose This study aims to evaluate the association between SGLT2 inhibitor use and the risks of adverse liver events among HF patients. Methods We conducted a retrospective cohort study using the Hong Kong Clinical Data Analysis and Reporting System (CDARS) to identify 80,248 HF patients (mean age 73.37 ± 12.88 years; 49.2% male) between 2013 and 2022. Propensity score matching was applied to achieve a 1:3 ratio of SGLT2 users to non-users, ensuring balanced baseline characteristics. Competing risk regression within Cox proportional hazards frameworks quantified the risks for cirrhosis, hepatocellular carcinoma, liver-related death, and significant elevations in liver enzymes (ALT or AST >3x normal and bilirubin >2x normal). Results During a median follow-up of 6.02 years (interquartile range: 3.48–9.25 years), there were 12,103 liver-related deaths. SGLT2 was associated with a 52% reduced risk of cirrhosis (adjusted subdistribution hazard ratio [SHR]: 0.48; 95% confidence interval [CI]: 0.36-0.65), a 61% lower risk of hepatocellular carcinoma (SHR: 0.39; 95% CI: 0.26-0.42), a 13% decreased risk of liver-related death (SHR: 0.87; 95% CI: 0.77-0.98), and a 19% risk reduction in elevated liver enzymes (SHR: 0.81; 95% CI: 0.68-0.96). 5-year cumulative incidences were 1.7%, 0.62%, 13%, and 5.4%, respectively, for SGLT2 users compared to 3.7%, 1.9%, 16%, and 7.0% for SGLT2 nonusers. Conclusion SGLT2 use is associated with a decreased risk of adverse liver outcomes in HF patients. This suggests a potential protective role for SGLT2 in liver health within this population.