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The relationships of patient factors and caregiver contribution to patients' self-care to different types of self-care have been rarely examined in Korean patients with heart failure.The aim of this study was to examine patient (ie, age, depressive symptoms, and self-care confidence) and caregiver (ie, caregiver contribution to self-care maintenance and self-care management, and caregiver confidence in contributing to self-care) factors related to different types of self-care (ie, self-care maintenance, symptom perception, and self-care management) and self-care confidence in Korean patients with heart failure.In this cross-sectional, correlational study, data from 41 pairs of patients (mean age, 68.0 years) and caregivers (mean age, 54.1 years) were collected and analyzed using multiple regression.Higher levels of self-care confidence in patients were related to higher levels of self-care maintenance in patients. Higher levels of self-care confidence in patients were related to higher levels of symptom perception. Higher levels of self-care confidence in patients and caregiver contribution to self-care maintenance were related to higher levels of self-care management. Less severe depressive symptoms in patients and higher levels of caregiver confidence in contributing to self-care were related to higher levels of self-care confidence.Different patient and caregiver factors were related to different types of self-care and self-care confidence in Korean patients, but patients' self-care confidence was related to all types of self-care. Clinicians and researchers need to develop and deliver effective interventions to both patients and their caregivers to improve patients' self-care confidence and, in turn, self-care, considering different factors associated with each type of self-care.