Aim: To describe a research protocol for a study designed to examine self-care in patient and caregiver dyads in coping with multiple chronic conditions, to evaluate the influence of dyad self-care on: (a) patient mortality, quality of life, hospital admissions, and the unplanned access of care; and (b) the positive aspects of caregiving. The specific conceptual framework that we developed for this study considers the predictors of self-care (at patient, caregiver, and dyadic levels), the process of self-care and the outcomes of self-care in patient and caregiver dyads with multiple chronic conditions. These elements in patient and caregiver dyads have not been well-studied to date. Design: This is a multicentre longitudinal study with data...