Background: We have previously reported benefits for reduced bullying, smoking, alcohol and other drug use and mental health from a trial of 'Learning Together', an intervention that aimed to modify school environments and implement restorative practice and a social and emotional skill curriculum.
Objectives: To conduct post hoc theory-driven analyses of broader impacts.
Design: Cluster randomised trial.
Settings: 40 state secondary schools in southern England.
Participants: Students aged 11/12 years at baseline.
Outcomes: Student self-reported measures at 24 and 36 months of: cyberbullying victimisation and perpetration; observations of other students perpetrating aggressive behaviours at school; own perpetration of aggressive behaviours in and outside school; perceived lack of safety at school; participation in school disciplinary procedures; truancy and e-cigarette use.
Results: We found evidence of multiple impacts on other health (reduced e-cigarette use, cyberbullying perpetration, perpetration of aggressive behaviours) and educational (reduced participation in school disciplinary procedures and truancy) outcomes.
Conclusion: These analyses suggested that the intervention was effective in bringing about a broader range of beneficial outcomes, adding to the evidence that the intervention is a promising approach to promote adolescent health via an intervention that is attractive to schools.
Trial registration number: ISRCTN10751359.
Keywords: epidemiology; public health; statistics & research methods.
© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY. Published by BMJ.