PROTOCOL: Experiences of Informal Caregivers of Dependent Older People on Interventions to Reduce Care Burden and Promote Their Biopsychosocial Well-Being.

It is predicted that by 2050, 22% of the world's population will be over 60 years old. Informal caregivers of dependent older adults face a significant physical, psychological and social burden. However, interventions designed to support these caregivers have predominantly been evaluated through quantitative outcomes. Qualitative evidence on the experiences and perceptions of these interventions reported by caregivers themselves remains largely unsynthesised. This review aims to identify and synthesise qualitative evidence on how informal caregivers of dependent older people experience and perceive interventions designed to alleviate the burden of caregiving and enhance their biopsychosocial well-being. For this purpose, a systematic search will be conducted in the following databases: MEDLINE (PubMed), CINAHL, PsycINFO, Web of Science Core Collection and ProQuest Dissertations & Theses Global. Publications in English and Spanish from 2014 onwards will be included. Grey literature will also be included. Search strategies will be developed with a research librarian and peer-reviewed using the PRESS checklist. Regarding selection criteria, primary qualitative studies and mixed-methods studies with accessible qualitative data exploring the experiences of informal caregivers of dependent older adults (60+) who have received interventions targeting burden reduction and biopsychosocial well-being will be included. Studies focused exclusively on palliative cancer care or on caregivers of people with cognitive impairment will be excluded. Data extraction will be conducted independently by two reviewers. Thematic synthesis will be conducted using Thomas and Harden's method. The methodological quality will be assessed using the CASP Qualitative Checklist and the confidence in the findings will be evaluated using GRADE-CERQual.