RT Journal Article T1 School bullying in children and adolescents with neurodevelopmental and psychiatric conditions: a systematic review and meta-analysis A1 Abregu-Crespo, Renzo A1 Garriz-Luis, Alexandra A1 Ayora, Miriam A1 Martín-Martínez, Nuria A1 Cavones, Vito A1 Carrasco, Miguel Angel A1 Díaz-Caneja, Covadonga M. A1 Fraguas Herráez, David A1 Martín Babarro, Javier A1 Arango López, Celso AB Background: Bullying is a common form of violence among children and adolescents. Young people with neurodevelopmental or psychiatric conditions might have an increased risk of bullying victimisation and perpetration. We aimed to assess the odds of bullying involvement and its association with mental health measures in these populations.Methods: In this systematic review and meta-analysis, we searched PubMed, ERIC, Psychology and Behavioural Sciences Collection, Web of Science Core Collection, PsycArticles, and PsycInfo databases from inception up to Aug 8, 2023, and included articles reporting data on bullying outcomes of current bullying (within the past year) among children and adolescents (aged 4-17 years) with a diagnosis of a neurodevelopmental or psychiatric condtion provided by a health professional. Bullying type was classified as traditional (physical, verbal, or relational) or as cyberbullying (intentional and repeated harm inflicted through electronic devices and social media), and bullying involvement was classified as victimisation, perpetration, and perpetration-victimisation. Mental health measures were collected and the associations with bullying involvement assessed. We used random-effects meta-analyses to estimate prevalence and odds ratios (ORs) for bullying involvement. Heterogeneity was assessed using the I2 statistic, and publication bias was tested with Egger's regression. This study is registered with PROSPERO, CRD42021235043.Findings: We included 212 studies in the meta-analysis. The total sample comprised 126 717 cases (mean age 12·34 years [SD 1·82], 37·6% girls) and 504 806 controls (12·5 years [SD 1·86], 47·6% girls). For traditional bullying, the pooled prevalence was 42·2% (95% CI 39·6-44·9) for victimisation, 24·4% (22·6-26·3) for perpetration, and 14·0% (11·4-17·1) for perpetration-victimisation. For cyberbullying, the prevalence was 21·8% (16·0-28·9) for victimisation, 19·6% (13·4-27·7) for perpetration, and 20·7% (8·4-42·6) for perpetration-victimisation. Compared with controls, young people with neurodevelopmental or psychiatric conditions were more likely to be involved in traditional and cyberbullying as a victim (OR 2·85 [95% CI 2·62-3·09] and 2·07 [1·63-2·61]), perpetrator (2·42 [2·20-2·66] and 1·91 [1·60-2·28]), and perpetrator-victim (3·66 [2·83-4·74] and 1·85 [1·05-3·28]). Bullying involvement was associated with higher scores in mental health measures in young people with neurodevelopmental or psychiatric conditions, particularly internalising symptoms and externalising symptoms.Interpretation: Our study underscores bullying involvement as a prevalent risk factor in young people with neurodevelopmental or psychiatric conditions that might add to their disease burden through its negative effects on mental health. Interventions targeting these vulnerable populations are warranted to improve their mental health and their future social integration. PB Elsevier YR 2023 FD 2023-12-15 LK https://hdl.handle.net/20.500.14352/116880 UL https://hdl.handle.net/20.500.14352/116880 LA eng NO Abregú-Crespo, R., Garriz-Luis, A., Ayora, M., Martín-Martínez, N., Cavone, V., Carrasco, M. Á., Fraguas, D., Martín-Babarro, J., Arango, C., & Díaz-Caneja, C. M. (2024). School bullying in children and adolescents with neurodevelopmental and psychiatric conditions: a systematic review and meta-analysis. The Lancet. Child & adolescent health, 8(2), 122–134. https://doi.org/10.1016/S2352-4642(23)00289-4 NO Ministerio de Ciencia e Innovación (España) NO Consorcio Centro de Investigación Biomédica en Red NO Instituto de Salud Carlos III (ISCIII) NO Gobierno Regional de la Comunidad de Madrid NO Fundación Alicia Koplowitz. NO Fundación Familia Alonso NO Unión Europea NO National Institute of Mental Health of the US National Institutes of Health DS Docta Complutense RD 10 abr 2025