Background
Congestive heart failure (CHF) hospitalizations cost the US $35 billion annually. Two-thirds of these admissions, generally requiring =3 days in the hospital, are solely for the purpose of diuresis, and may be avoidable.
Methods
Among patients discharged with CHF as the principal diagnosis (PD), we compared characteristics and outcomes between those with hospital length of stay (LOS) =3 days (short, SLOS) and >3 days (long, LLOS) in a cross-sectional multicenter analysis within the 2018 National Inpatient Sample. We applied complex survey methods to calculate nationally representative results.
Results
Among 4,979,350 discharges with any CHF code, 1,177,910 (23.7%) had CHF-PD, of whom 511,555 (43.4%) had SLOS. Patients with SLOS were younger (>/=65 years: 68.3% vs 71.9%), less likely covered by Medicare (71.9% vs 75.4%), and had a lower comorbidity burden (Charlson: 3.9 [2.1] vs 4.5 [2.2) than patients with LLOS; they less frequently developed acute kidney injury (0.4% vs 2.9%) or a need for mechanical ventilation (0.7% vs 2.8%). A higher proportion with SLOS than with LLOS underwent no procedures (70.4% vs 48.4%). Mean LOS (2.2 [0.8] vs 7.7 [6.5]), direct hospital costs ($6150 [$4413]) vs $17,127 [$26,936]), and aggregate annual hospital costs $3,131,560,372 vs $11,359,002,072) were all lower with SLOS than LLOS. All comparisons reached alpha = 0.001.
Conclusion
Among patients admitted for CHF, nearly ½ have LOS =3 days, and almost ¾ of them requires no inpatient procedures. A more aggressive outpatient heart failure management strategy may allow many patients to avoid hospitalizations and their potential complications and costs.