title: Associations Between Peer Victimization and Suicidal Ideation and Suicide Attempt During Adolescence: Results From a Prospective Population-Based Birth Cohort.
abstract: OBJECTIVE
  To test whether adolescents who are victimized by peers are at heightened risk for suicidal ideation and suicide attempt, using both cross-sectional and prospective investigations.
  
  
  METHODS
  Participants are from the Quebec Longitudinal Study of Child Development, a general population sample of children born in Quebec in 1997 through 1998 and followed up until 15 years of age. Information about victimization and serious suicidal ideation and suicide attempt in the past year was obtained at ages 13 and 15 years from self-reports (N = 1,168).
  
  
  RESULTS
  Victims reported concurrently higher rates of suicidal ideation at age 13 years (11.6-14.7%) and suicide attempt at age 15 years (5.4-6.8%) compared to those who had not been victimized (2.7-4.1% for suicidal ideation and 1.6-1.9% for suicide attempt). Being victimized by peers at 13 years predicted suicidal ideation (odds ratio [OR] = 2.27; 95% CI = 1.25-4.12) and suicide attempt (OR = 3.05, 95% CI = 1.36-6.82) 2 years later, even after adjusting for baseline suicidality and mental health problems and a series of confounders (socioeconomic status, intelligence, family's functioning and structure, hostile-reactive parenting, maternal lifetime suicidal ideation/suicide attempt). Those who were victimized at both 13 and 15 years had the highest risk of suicidal ideation (OR = 5.41, 95% CI = 2.53-11.53) and suicide attempt (OR = 5.85, 95% CI = 2.12-16.18) at 15 years.
  
  
  CONCLUSIONS
  Victimization is associated with an increased risk of suicidal ideation and suicide attempt over and above concurrent suicidality and prior mental health problems. The longer the history of victimization, the greater the risk.
authors.affiliation: McGill University, Montreal and the McGill Group for Suicide Studies at the Douglas Mental Health University Institute, Montreal; Research Unit on Children's Psychosocial Maladjustment at University of Montreal. Electronic address: Marie-claude.geoffroy@mcgill.ca.
authors.forename: Marie-Claude
authors.initials: MC
authors.lastname: Geoffroy
authors.affiliation: Laval University, Quebec, the Research Unit on Children's Psychosocial Maladjustment at Laval University, and the Institute of Genetic, Neurobiological, and Social Foundations of Child Development at the Tomsk State University, Tomsk, Russian Federation.
authors.forename: Michel
authors.initials: M
authors.lastname: Boivin
authors.affiliation: Institute of Psychiatry, Psychology and Neuroscience at King's College London.
authors.forename: Louise
authors.initials: L
authors.lastname: Arseneault
authors.affiliation: McGill University, Montreal and the McGill Group for Suicide Studies at the Douglas Mental Health University Institute, Montreal.
authors.forename: Gustavo
authors.initials: G
authors.lastname: Turecki
authors.affiliation: University of Montreal, the Research Unit on Children's Psychosocial Maladjustment at the University of Montreal, and the Sainte-Justine Hospital Research Centre, Montreal.
authors.forename: Frank
authors.initials: F
authors.lastname: Vitaro
authors.affiliation: University of Quebec in Montreal, the Research Unit on Children's Psychosocial Maladjustment at the University of Montreal, and the Sainte-Justine Hospital Research Centre.
authors.forename: Mara
authors.initials: M
authors.lastname: Brendgen
authors.affiliation: McGill University, and with the McGill Group for Suicide Studies and the Manulife Centre for Breakthroughs in Teen Depression and Suicide Prevention at the Douglas Mental Health University Institute.
authors.forename: Johanne
authors.initials: J
authors.lastname: Renaud
authors.affiliation: University of Montreal, the Research Unit on Children's Psychosocial Maladjustment at the University of Montreal, and the Sainte-Justine Hospital Research Centre, Montreal.
authors.forename: Jean R
authors.initials: JR
authors.lastname: Séguin
authors.affiliation: University of Montreal, the University College Dublin, and the Institute of Genetic, Neurobiological, and Social Foundations of Child Development at the Tomsk State University.
authors.forename: Richard E
authors.initials: RE
authors.lastname: Tremblay
authors.affiliation: University of Montreal, the Institute of Genetic, Neurobiological, and Social Foundations of Child Development at the Tomsk State University, the Research Unit on Children's Psychosocial Maladjustment at the University of Montreal, and the Sainte-Justine Hospital Research Centre.
authors.forename: Sylvana M
authors.initials: SM
authors.lastname: Côté
mesh_terms: D000293:Adolescent; D058445:Bullying; D019548:Crime Victims / Q000523:psychology*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D010379:Peer Group; D011446:Prospective Studies; D012307:Risk Factors; D057566:Self Report; D059020:Suicidal Ideation; D013405:Suicide / Q000523:psychology*; D013406:Suicide, Attempted / Q000523:psychology*; D011795:Surveys and Questionnaires
keywords: adolescence; bullying; peer victimization; suicidal ideation; suicide attempt