25. Multiple Imputation for Nonresponse in Surveys. By D. B. Rubin. ISBN 0 471 08705 X. Wiley, Chichester, 1987. 258 pp. £30.25.

Multiple Imputation for Nonresponse in Surveys

Bullying Prevalence Across Contexts: A Meta-analysis Measuring Cyber and Traditional Bullying

AIM To identify health and psychosocial problems associated with bullying victimization and conduct a meta-analysis summarizing the causal evidence. METHODS A systematic review was conducted using PubMed, EMBASE, ERIC and PsycINFO electronic databases up to 28 February 2015. The study included published longitudinal and cross-sectional articles that examined health and psychosocial consequences of bullying victimization. All meta-analyses were based on quality-effects models. Evidence for causality was assessed using Bradford Hill criteria and the grading system developed by the World Cancer Research Fund. RESULTS Out of 317 articles assessed for eligibility, 165 satisfied the predetermined inclusion criteria for meta-analysis. Statistically significant associations were observed between bullying victimization and a wide range of adverse health and psychosocial problems. The evidence was strongest for causal associations between bullying victimization and mental health problems such as depression, anxiety, poor general health and suicidal ideation and behaviours. Probable causal associations existed between bullying victimization and tobacco and illicit drug use. CONCLUSION Strong evidence exists for a causal relationship between bullying victimization, mental health problems and substance use. Evidence also exists for associations between bullying victimization and other adverse health and psychosocial problems, however, there is insufficient evidence to conclude causality. The strong evidence that bullying victimization is causative of mental illness highlights the need for schools to implement effective interventions to address bullying behaviours.

Consequences of bullying victimization in childhood and adolescence: A systematic review and meta-analysis.

The Nature of Prejudice

The adolescent society

IMPORTANCE Peer victimization is related to an increased chance of suicidal ideation and suicide attempts among children and adolescents. OBJECTIVE To examine the relationship between peer victimization and suicidal ideation or suicide attempts using meta-analysis. DATA SOURCES Ovid MEDLINE, PsycINFO, and Web of Science were searched for articles from 1910 to 2013. The search terms were bully*, teas*, victim*, mobbing, ragging, and harassment in combination with the term suic*. Of the 491 studies identified, 34 reported on the relationship between peer victimization and suicidal ideation, with a total of 284 375 participants. Nine studies reported on the relationship between peer victimization and suicide attempts, with a total of 70 102 participants. STUDY SELECTION Studies were eligible for inclusion if they reported an effect size on the relationship between peer victimization and suicidal ideation or suicide attempt in children or adolescents. DATA EXTRACTION AND SYNTHESIS Two observers independently coded the effect sizes from the articles. Data were pooled using a random effects model. MAIN OUTCOMES AND MEASURES This study focused on suicidal ideation and suicide attempts. Peer victimization was hypothesized to be related to suicidal ideation and suicide attempts. RESULTS Peer victimization was found to be related to both suicidal ideation (odds ratio, 2.23 [95% CI, 2.10-2.37]) and suicide attempts (2.55 [1.95 -3.34]) among children and adolescents. Analyses indicated that these results were not attributable to publication bias. Results were not moderated by sex, age, or study quality. Cyberbullying was more strongly related to suicidal ideation compared with traditional bullying. CONCLUSIONS AND RELEVANCE Peer victimization is a risk factor for child and adolescent suicidal ideation and attempts. Schools should use evidence-based practices to reduce bullying. Language: en

https://jamanetwork.com/journals/jamapediatrics/articlepdf/1840250/poi130074.pdf

Relationship Between Peer Victimization, Cyberbullying, and Suicide in Children and Adolescents: A Meta-analysis

https://scholarlypublications.universiteitleiden.nl/access/item%3A2868450/view

Which personality traits are related to traditional bullying and cyberbullying? A study with the Big Five, Dark Triad and sadism

Over three decades of longitudinal research on the development of foster children: a meta-analysis

The relation between peer victimization and sleeping problems: A meta-analysis.

Several studies suggest that there are relations between children's or adolescents' self-injurious behaviors and peer victimization. In the current study, a meta-analysis was performed to study the relations between non-suicidal self-injury and peer victimization. Non-suicidal self-injury focuses on self-injurious behaviors without suicidal intent, that result in immediate tissue damage and are not socially sanctioned within one's culture or for display. Using a meta-analysis, effect sizes of existing studies can be statistically summarized, and publication bias and moderators can be analyzed. The databases PsycINFO, MEDLINE, ERIC and ProQuest were searched for relevant articles. Articles were only included if they focused on children or adolescents, if they focused on non-clinical samples, and if they focused on self-injuring behaviors as opposed to thoughts or ideation. We found nine studies with fourteen independent samples and a total of 20,898 adolescents and children reporting on the relation between peer victimization and non-suicidal self-injury. Our analysis showed positive and significant relations between non-suicidal self-injury and peer victimization. Further analyses showed an absence of publication bias. Younger children that were victimized reported significantly more non-suicidal self-injury than older children. By preventing peer victimization we may potentially prevent non-suicidal self-injury in children and adolescents.

Mitch van Geel

Papers

Relationship Between Peer Victimization, Cyberbullying, and Suicide in Children and Adolescents: A Meta-analysis

Which personality traits are related to traditional bullying and cyberbullying? A study with the Big Five, Dark Triad and sadism

Over three decades of longitudinal research on the development of foster children: a meta-analysis

The relation between peer victimization and sleeping problems: A meta-analysis.

A meta-analysis on the relation between peer victimization and adolescent non-suicidal self-injury.