OBJECTIVE: This study aimed to identify and assess the psychometric properties of assessment instruments of caregiver contributions to self-care of chronic illness. METHODS: Ten databases and relevant websites were used to retrieve relevant literature. Methodological quality was assessed using the Consensus-based Standards for the Selection of Health Measurement Instruments (COSMIN) Risk of Bias Checklist. Each instrument's psychometric properties were assessed using COSMIN criteria. The recommendation level was assessed using a modified Grading, Recommendations, Assessment, Development, and Evaluation system. RESULTS: Twenty-three studies reported 11 different instrument versions. None of the instruments exhibited an A-level recommendation. The Caregiver Contribution to Heart Failure Self-care (CACHS) scale can be temporarily recommended. Significant issues exist with the standardization of result reporting, instrument development, content validity, and criterion validity. CONCLUSION: According to this study's findings, the CACHS scale can be provisionally recommended. Further research on reporting standards, instrument development, content validity, and criterion validity is required.
