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Social isolation is associated with 90-day rehospitalization due to heart failure

Background: Social isolation has been reported to be associated with decreased quality of life and the onset of organic diseases. The objective of this study was to investigate the prevalence of social isolation in patients with heart failure and whether it is associated with rehospitalization. Methods and results: The study included consecutive patients aged ⩾55 years who were hospitalized due to heart failure. Social isolation was assessed using total scores less than 12 on an abbreviated version of the Lubben Social Network Scale. The endpoint was heart failure rehospitalization within 90 days after discharge. Among 148 patients with heart failure (80±8 years old, 51% male), 73 (49%) were socially isolated. The patients with social isolation had similar comorbidities compared with those without social isolation. Heart failure rehospitalization occurred within 90 days for 25 patients and the heart failure rehospitalization rate was significantly higher in the social isolation group (p=0.036). LASSO (least absolute shrinkage and selection operator) regression confirmed that social isolation was one of the strongest predictors of heart failure rehospitalization, showing larger effects than living alone, being unemployed, and other established risk factors. Conclusion: Half of the patients with heart failure reported social isolation, which had a strong association with heart failure rehospitalization.