Swabe, Gretchen

Background: Outcomes in heart failure with reduced ejection fraction (HFrEF) are influenced by access and adherence to guideline-directed medical therapy. Our objective was to study the association between annual household income and: (1) the odds of having a claim for sacubitril/valsartan among insured patients with HFrEF and (2) medication adherence (measured as the proportion of days covered). We hypothesized that lower annual household income is associated with decreased odds of having a claim for and adhering to sacubitril/valsartan. Methods: Using the Optum de-identified Clinformatics Data Mart, patients with HFrEF and ≥6 months of enrollment for follow-up (2016–2020) were included. Covariates included age, sex, race, ethnicity, educational attainment, US region, number of prescribed medications, and Elixhauser Comorbidity Index. Prescription for sacubitril/valsartan was defined by the presence of a claim within 6 months of HFrEF diagnosis. Adherence was defined as proportion of days covered ≥80%. We fit multivariable-adjusted logistic regression models and hierarchical logistic regression accounting for covariates. Results: Among 322 007 individuals with incident HFrEF, 135 282 had complete data for analysis. Of the patients eligible for sacubitril/valsartan, 4.7% (6372) had a claim within 6 months of HFrEF diagnosis. Following multivariable adjustment, individuals in the lowest annual income category (<$40 000) were significantly less likely (odds ratio, 0.83 [95% CI, 0.76–0.90]) to have a sacubitril/valsartan claim within 6 months of HFrEF diagnosis than those in the highest annual income category (≥$100 000). Annual income <$40 000 was associated with lower odds of proportion of days covered ≥80% compared with income ≥$100 000 (odds ratio, 0.70 [95% CI, 0.59–0.83]). Conclusions: Lower household income is associated with decreased likelihood of a sacubitril/valsartan claim and medication adherence within 6 months of HFrEF diagnosis, even after adjusting for sociodemographic and clinical factors. Future analyses are needed to identify additional social factors associated with delays in sacubitril/valsartan initiation and long-term adherence.

Background: Outcomes in heart failure with reduced ejection fraction (HFrEF), are influenced by access and adherence to guideline directed medical therapy. Objective: To study the association between median annual household income and: (1) odds of receiving sacubitril/valsartan, a novel angiotensin receptor/neprilysin inhibitor (ARNI) therapy among insured patients with heart failure with reduced ejection fraction (HFrEF) and (2) medication adherence (measured as the proportion of days covered (PDC)). Hypothesis: lower income is associated with lower odds of receiving and adhering to ARNI among patients with HFrEF. Methods: Using Optum’s deidentified Clinformatics® Data Mart, patients with ≥ 2 diagnoses of HFrEF and ≥ 6 months of enrollment for follow up (2016-2020) were included. Covariates included age, race, ethnicity, sex, educational attainment, household net worth, geographical region and Elixhauser comorbidity index. Prescription for ARNI was defined by presence of a claim within 180 days. Adherence was defined as PDC ≥80%. We fit multivariable-adjusted logistic regression models and hierarchical logistic regression accounting for covariates. We also assessed for race-income interaction. Results: Among 322007 individuals with HFrEF diagnosis, 136,613 had ≥6 months of complete data. Of the patients eligible for ARNI, only 5.4% (7409/136613) received a claim within 180 days of HFrEF diagnosis. After adjusting for social and clinical factors, the odds were elevated for ARNI claim within 180 days of HFrEF diagnosis (OR=1.38, 95% CI: 1.27, 1.49) for the highest income category (>$100K) compared with the lowest (<$40K). After adjustment, income <$40k) was associated with a 47% higher odds of PDC<80% compared with income >$100K. Conclusions: Higher patient income is associated with increased likelihood of an ARNI claim within 180 days of HFrEF diagnosis, even after adjusting for socioeconomic and clinical factors. Future analyses are needed to determine other social factors associated with delay in ARNI initiation and long-term adherence.