A systematic review of school-based student peer-led oral health interventions to promote the oral health of school children

BACKGROUND: Poor oral health in children highlights the need for prevention and effective interventions. During late childhood and adolescence, peer relationships can play a vital role in adopting and maintaining positive health behaviours. AIM: To identify the oral health outcomes of school-based student peer-led delivery of oral health interventions. METHODS: A search strategy was developed, piloted, and run in four electronic databases: Medline via Ovid, Web of Science, CINAHL via EBSCO, and CENTRAL (Cochrane Central Register of Controlled Trials) using key concepts of peer, oral health and adolescent in the school context. Methodological quality was assessed using QuaDs quality assessment tool. All articles were independently screened by two researchers and data was analysed using narrative data synthesis. The PRISMA checklist complemented by aspects of the Synthesis Without Meta-analysis (SWiM) was used to report this systematic review. RESULTS: There were 7572 identified, 24 studies progressed to full-text review, ten studies met the eligibility criteria and were included in the review. Only six studies based their interventions on psychological & behavioural theory. Intervention delivered by peers showed improvements in both clinical and self-reported outcomes when compared to other delivery methods (e.g., professionals). Quality of included studies was reported according to QuaDs guidance. CONCLUSION: Peer-led interventions were more effective in improving oral health status and behaviours when compared to other modes of delivery. Future research should assess if a bi-directional impact of peer-led interventions can be seen. Specifically, if there is added value for school-based student peer-leader's including their own oral health knowledge, skills, attitude and preventative behaviours. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12903-023-03482-1.