title: [Prevalence of deliberate self-harm and its relation with suicidal behaviors among students in middle schools in Beijing].
abstract: OBJECTIVE
  To understand the prevalence of deliberate self-harm in middle school students in Beijing, and explore the relationship between self-harm and suicidal behaviors.
  
  
  METHODS
  An anonymous self-administered questionnaire survey was conducted among 5 807 students selected through cluster random sampling from grade 9 to grade 12 in 16 middle schools in Beijing.
  
  
  RESULTS
  Among the surveyed middle school students, 35.6% reported that they once had self-harm behaviors, 7.0% reported often had self-harm behaviors in the past 30 days before the survey. More girls reported self-harm behaviors than boys did. And the prevalence of self-harm behaviors was highest in girls in grade 8 and in boys in grade 9. The students in key senior high schools, or living with single or remarried parents were the risk population to have self-harm behaviors. Higher suicide behavior reporting rate was correlated with higher self-harm behavior reporting rate. Compared with students who reported no self-harm behaviors during the past month, the suicide behavior reporting rate in students reporting self-harm behaviors increased by 5.7-12.3 times.
  
  
  CONCLUSIONS
  Deliberate self-harm behaviors were associated with suicide behaviors among middle school students in Beijing. Early psychological intervention and life education should be carried out among middle school students in order to find risk population and save their life.
authors.affiliation: Institute of Child and Adolescent Health, Peking University Health Science Center, Beijing 100191, China; Email: xingyang@bjmu.edu.cn.
authors.forename: Yi
authors.initials: Y
authors.lastname: Xing
authors.affiliation: Child Healthcare Department, Tianjin Women and Children Health Center.
authors.forename: Yijuan
authors.initials: Y
authors.lastname: Qiao
authors.affiliation: Institute of School Health, Beijing Center for Disease Control and Prevention.
authors.forename: Jiali
authors.initials: J
authors.lastname: Duan
authors.affiliation: Institute of School Health, Beijing Center for Disease Control and Prevention.
authors.forename: Chengxu
authors.initials: C
authors.lastname: Bai
mesh_terms: D000293:Adolescent; D000068476:Beijing / Q000453:epidemiology; D002648:Child; D005191:Family Characteristics; D005260:Female; D006801:Humans; D008297:Male; D010290:Parents; D015995:Prevalence; D012307:Risk Factors; D012574:Schools; D016728:Self-Injurious Behavior / Q000453:epidemiology* / Q000208:ethnology / Q000523:psychology*; D013334:Students / Q000523:psychology* / Q000706:statistics & numerical data; D059020:Suicidal Ideation; D011795:Surveys and Questionnaires; D035862:Vulnerable Populations