OBJECTIVES:
To assess the multimorbidity burden and its association with clinical outcomes in adults with heart failure (HF) according to sex, age, and HF type.
DESIGN:
Retrospective cohort study.
SETTING and PARTICIPANTS:
114, 553 adults with HF from five healthcare delivery systems across the U.S.
MEASUREMENTS:
We characterized patients with respect to the presence of 26 chronic conditions categorized into quartiles based on overall burden of comorbidity (0–4, 5–6, 7–8, ≥9). Outcomes included all-cause death and hospitalizations for HF or any cause. Multivariable Cox regression was used to evaluate the adjusted association of categorized burden of multimorbidity burden with outcomes.
RESULTS:
Among 114,553 adults with HF, adjusted hazard ratios (HR) for all-cause death among those with 5–6, 7–8, or 9 or more morbidities (vs. 0–4) were HR 1.27 (95% CI, 1.24–1.31), HR 1.52 (95% CI, 1.48–1.57), and HR 1.92 (95% CI, 1.86–1.99), respectively. There was a graded, higher adjusted rate of any-cause hospitalization associated with 5–6, 7–8, or 9 or more morbidities (vs. 0–4): HR 1.28 (95% CI, 1.25–1.30), HR 1.47 (95% CI, 1.44–1.50), and HR 1.77 (95% CI, 1.73–1.82), respectively. Similar findings were observed for HF-specific hospitalization in those with 5–6, 7–8, or 9 or more morbidities (vs. 0–4): HR 1.22 (95% CI, 1.19–1.26), HR 1.39 (95% CI, 1.34–1.44), and HR 1.68 (95% CI, 1.61–1.74), respectively. Consistent findings were seen by sex, age group and HF type (preserved, reduced, borderline HF), with the relationship between categorical burden of multimorbidity and outcomes especially prominent among those <65 years.
CONCLUSION:
After adjustment higher levels of multimorbidity predict worse HF outcomes and may be an important consideration in strategies to improve clinical and patient-centered outcomes.