[A cohort study of association between greenbelt around schools and non-suicidal self-injury behaviors in children and adolescents].

Higher greenbelt exposure around schools was a protective factor for NSSI in adolescents, and this association was significant across subgroups defined by gender and urban-rural residence. Optimizing greenbelt environments in and around schools might serve as a potential public health strategy for prevention of NSSI in adolescents.