Background: Self-care training can reduce hospitalization for heart failure (HF), and more intensive intervention may benefit more vulnerable patients, including those with low literacy.
Methods and results: A 1-year, multisite, randomized, controlled comparative effectiveness trial with 605 patients with HF was conducted. Those randomized to a single session received a 40-minute in-person, literacy-sensitive training; the multisession group received the same initial training and then ongoing telephone-based support. The primary outcome was combined incidence of all-cause hospitalization or death; secondary outcomes included HF-related hospitalization and HF-related quality of life, with prespecified stratification by literacy. Overall, the incidence of all-cause hospitalization and death did not differ between intervention groups (incidence rate ratio, 1.01; 95% confidence interval, 0.83-1.22). The effect of multisession training compared with single-session training differed by literacy group: Among those with low literacy, the multisession training yielded a lower incidence of all-cause hospitalization and death (incidence rate ratio, 0.75; 95% confidence interval, 0.45-1.25), and among those with higher literacy, the multisession intervention yielded a higher incidence (incidence rate ratio, 1.22; 95% confidence interval, 0.99-1.50; interaction P=0.048). For HF-related hospitalization, among those with low literacy, multisession training yielded a lower incidence (incidence rate ratio, 0.53; 95% confidence interval, 0.25-1.12), and among those with higher literacy, it yielded a higher incidence (incidence rate ratio, 1.32; 95% confidence interval, 0.92-1.88; interaction P=0.005). HF-related quality of life improved more for patients receiving multisession than for those receiving single-session interventions at 1 and 6 months, but the difference at 12 months was smaller. Effects on HF-related quality of life did not differ by literacy.
Conclusions: Overall, an intensive multisession intervention did not change clinical outcomes compared with a single-session intervention. People with low literacy appear to benefit more from multisession interventions than people with higher literacy.
Clinical trial registration: URL: http://www.clinicaltrials.gov. Unique identifier: NCT00378950.