Abstract
Health literacy (HL), the ability to obtain and understand health information, is critical to self-care in chronic disorders. A low HL is common among these patients and has been associated with a worse prognosis. Nevertheless, the relationship between HL and the prognosis of heart failure (HF) with reduced (HFrEF) vs. preserved (HFpEF) ejection fraction remains unsettled. To analyse the relationship between HL and the prognosis of patients with incident HFrEF and HFpEF. Prospective study over 10 years (2010-19) on 6444 patients diagnosed with incident HF. The main outcomes were mortality, hospitalizations, and visits to emergency services. The independent relationship between HL and the prognosis, stratifying patients for cardiovascular comorbidity after propensity score-matching was analysed.After matching 5355 HF patients, 1785 with low HL (874 with HFrEF and 911 with HFpEF) vs. 3570 with adequate HL (1748 with HFrEF and 1822 with HFpEF), during a median follow-up of 5.41 years, 3874 patients died (72.3%) and 3699 patients were hospitalized (69.1%). After adjustment for potential confounders, an adequate HL was associated with a lower all-cause and cardiovascular mortality, less hospitalizations, and less 30-day readmissions [relative risk (RR) for HF <0.72 (0.66-0.86), RR for HFrEF <0.69 (0.63-0.95), and RR for HFpEF <0.62 (0.55-0.88), P < 0.001 in all cases], both for patients with HFrEF and HFpEF. Analyses of recurrent hospitalizations gave larger HL effects than time-to-first-event analyses. In this propensity-matched study, a low HL is associated with a worse prognosis of patients with incident HFrEF and HFpEF.
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