Abstract P387: Length of Stay Among Medicare Beneficiaries Hospitalized with Heart Failure

Abstract

Background: Heart failure (HF) is among the most common reasons for hospitalization in the United States. Hospital length of stay (LOS) is a driver of cost and disease burden. Objectives: To examine factors associated with LOS of HF hospitalizations. Methods: Medicare beneficiaries with fee-for-service and pharmacy coverage who had HF hospitalizations (inpatient claims with ≥1 overnight stay/2 hospital days with HF as the primary discharge diagnosis, discharged alive) between 2007 and 2011 were identified in the Medicare national 5% sample. The median and interquartile range (IQR) LOS was calculated by demographic characteristics, comorbidities, and discharge status based on Medicare claims data with the Kruskal-Wallis test to compare distributions in the overall population with HF (n = 45,584) and in the subpopulation with documented systolic dysfunction (n = 10,256). Results: The median LOS was 5 days (range 2-255, IQR 4-8 days) in the overall HF population and 5 days (range 2-204, IQR 4-8 days) in those with systolic dysfunction. Across most demographic characteristics and comorbidities, the median LOS was 5 days but was higher among nursing home residents and individuals with malnutrition in both groups and with chronic kidney disease in those with systolic dysfunction ( Figure ). All comorbidities were associated with a shift in the distribution toward longer LOS in the population with systolic dysfunction and all but coronary heart disease in the overall population (p < 0.001). HF patients discharged to a skilled nursing facility had longer LOS (median 7 days, IQR 5-10 days) versus other discharge statuses (median 5 days, IQR 3-7 days, p < 0.001) in both populations. Conclusions: In patients hospitalized for HF, the median LOS was 5 days across most comorbidities and other characteristics, but comorbidities were associated with a shift in the upper tail of the distribution toward longer LOS. Worse functional status (nursing residence or discharge to a skilled nursing facility) was associated with a higher median LOS.