Cancer is the leading cause of death and morbidity among children and adolescents worldwide. Functionality-based interventions are relevant among children and adolescents with an oncological diagnosis, whence studies summarising evidence on this topic are needed. This systematic review will summarise evidence on the effect of interventions to improve functionality indicators among paediatric patients diagnosed with cancer.

This protocol will follow Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA)-Protocols reporting guidelines. The systematic review will be conducted according to the Cochrane Handbook and PRISMA 2020. Studies will be searched in MEDLINE (PubMed), Embase, Web of Science, CENTRAL, LILACS and PEDro. Additional searches will include Google Scholar, reference lists of included studies, relevant reviews and trial registries. Studies will be included if they implement a functionality-based intervention. They must evaluate effects among paediatric patients with an oncological diagnosis. Secondary outcomes will include health-related quality of life. There will be no limits to language or year of publication, and articles published in peer-reviewed journals will be accepted. Only randomised controlled trials will be included. Risk of bias will be assessed using the Cochrane Risk of Bias Tool 2. Two independent reviewers will select studies, extract data and assess risk of bias. A narrative synthesis and meta-analysis will be conducted if studies are clinically and methodologically homogeneous. Statistical heterogeneity will be assessed using Higgins’ inconsistency test (I^²). Meta-analysis may estimate combined effects using random-effects and the inverse variance method. The R statistical software will be used. The certainty of evidence will be evaluated for each outcome using the Grading of Recommendations Assessment, Development and Evaluation system.

This study used data from previously published studies, thus waiving submission to an Ethics Committee. Scientific dissemination strategies will include publication in peer-reviewed journals, conference presentations and workshops for the public.

CRD42024462833.