title: Nonsuicidal self-harm in youth: a population-based survey.
abstract: BACKGROUND
  Nonsuicidal self-harm includes cutting, scratching, burning and minor overdosing. There have been few studies that have examined the rate of self-harm and mental-health correlates among community-based youth. We performed a population-based study to determine the prevalence of nonsuicidal self-harm, its mental-health correlates and help-seeking behaviour.
  
  
  METHODS
  We used data from the Victoria Healthy Youth Survey, a population-based longitudinal survey of youth aged 14-21 in Victoria, British Columbia. The survey included questions about the history, method, frequency, age of onset and help-seeking for nonsuicidal self-harm. Youth were interviewed between February and June 2005. Univariable group differences were analyzed using students t test for continuous data and chi2 for binary or categorical data. Multivariate analyses were conducted by use of multivariate analysis of variance and logistic regression.
  
  
  RESULTS
  Ninety-six of 568 (16.9%) youth indicated that they had ever harmed themselves. Self-injuries such as cutting, scratching and self-hitting were the most common forms of nonsuicidal self-harm (83.2%). The mean age of onset was 15.2 years. Of those who reported nonsuicidal self-harm, 56% had sought help for this behaviour. Participants who reported 5 or more symptoms (out of 6) in a given symptom category were more likely than those who reported less than 5 symptoms to report nonsuicidal self-harm for the following categories: depressive mood (odds ratio [OR] 2.18, confidence interval [CI] 1.28-3.7) and problems with regulation of attention, impulsivity and activity (OR 2.24, CI 1.33-3.76).
  
  
  CONCLUSIONS
  We found a high lifetime prevalence of nonsuicidal self-harm. Many mental-health symptoms were associated with this behaviour, particularly those with depressive mood and attention-related problems. Just over half of youth reported seeking help for nonsuicidal self-harm. Clinicians who encounter youth should be vigilant to assess for this behaviour in youth who present with mental health issues.
authors.affiliation: Centre for Youth and Society, University of Victoria, Victoria, BC. mary.nixon@viha.ca
authors.forename: Mary K
authors.initials: MK
authors.lastname: Nixon
authors.forename: Paula
authors.initials: P
authors.lastname: Cloutier
authors.forename: S Mikael
authors.initials: SM
authors.lastname: Jansson
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D001955:British Columbia / Q000453:epidemiology; D016009:Chi-Square Distribution; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D006306:Health Surveys; D006801:Humans; D016015:Logistic Models; D008137:Longitudinal Studies; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology*; D015995:Prevalence; D012307:Risk Factors; D016728:Self-Injurious Behavior / Q000453:epidemiology*