Sacubitril/Valsartan Adherence and Postdischarge Outcomes Among Patients Hospitalized for Heart Failure With Reduced Ejection Fraction

Objectives: The authors sought to investigate associations between sacubitril/valsartan adherence and clinical outcomes after hospitalization for heart failure with reduced ejection fraction (HFrEF). Background: Sacubitril/valsartan improves outcomes in HFrEF, though the extent to which medication adherence is associated with outcomes in routine care is less well characterized. Methods: The authors analyzed patients aged ≥65 years hospitalized for HFrEF within the Get With the Guidelines–Heart Failure registry linked with Medicare claims between October 2015 and September 2018 who were discharged with sacubitril/valsartan. Sacubitril/valsartan adherence was assessed using medication fills to calculate proportion of days covered (PDC) through 90 days postdischarge. Associations between postdischarge adherence (PDC < or ≥80%) and risk of readmission and death within 1 year were examined by comparing cumulative incidences and adjusted event rates. Results: Among 897 patients prescribed sacubitril/valsartan at discharge, 295 (32.9%) had PDC ≥80% and 602 (67.1%) had PDC <80%. Baseline characteristics were balanced between groups. Compared with patients with PDC <80%, patients with PDC ≥80% had a significantly lower adjusted hazard of all-cause rehospitalization (HR: 0.66 [95% CI: 0.48-0.89]) and death (HR: 0.42 [95% CI: 0.22-0.79]) at 90 days and at 1 year (HR: 0.69 [95% CI: 0.56-0.86] and HR: 0.53 [95% CI: 0.38-0.74], respectively). For every 5 percentage point increase in PDC, patients experienced a significant reduction in rehospitalization (HR: 0.98 [95% CI: 0.97-0.99]) and death (HR: 0.96 [95% CI: 0.94-0.97]) at 1 year. Conclusions: In patients hospitalized for HFrEF and discharged on sacubitril/valsartan, high adherence to sacubitril/valsartan within 90 days after discharge was associated with substantially lower rates of readmission and death. Additional efforts to improve adherence with sacubitril/valsartan and other guideline-directed medical therapies in HFrEF are warranted.