title: A school-based program to prevent adolescent dating violence: a cluster randomized trial.
abstract: OBJECTIVE
  To determine whether an interactive curriculum that integrates dating violence prevention with lessons on healthy relationships, sexual health, and substance use reduces physical dating violence (PDV).
  
  
  METHODS
  Cluster randomized trial with 2.5-year follow-up; prespecified subgroup analyses by sex.
  
  
  METHODS
  Grade 9 health classes.
  
  
  METHODS
  A total of 1722 students aged 14-15 from 20 public schools (52.8% girls). Intervention A 21-lesson curriculum delivered during 28 hours by teachers with additional training in the dynamics of dating violence and healthy relationships. Dating violence prevention was integrated with core lessons about healthy relationships, sexual health, and substance use prevention using interactive exercises. Relationship skills to promote safer decision making with peers and dating partners were emphasized. Control schools targeted similar objectives without training or materials.
  
  
  METHODS
  The primary outcome at 2.5 years was self-reported PDV during the previous year. Secondary outcomes were physical peer violence, substance use, and condom use. Analysis was by intention-to-treat.
  
  
  RESULTS
  The PDV was greater in control vs intervention students (9.8% vs 7.4%; adjusted odds ratio, 2.42; 95% confidence interval, 1.00-6.02; P = .05). A significant group x sex interaction effect indicated that the intervention effect was greater in boys (PDV: 7.1% in controls vs 2.7% in intervention students) than in girls (12.1% vs 11.9%). Main effects for secondary outcomes were not statistically significant; however, sex x group analyses showed a significant difference in condom use in sexually active boys who received the intervention (114 of 168; 67.9%) vs controls (65 of 111 [58.6%]) (P < .01). The cost of training and materials averaged CA$16 per student.
  
  
  CONCLUSIONS
  The teaching of youths about healthy relationships as part of their required health curriculum reduced PDV and increased condom use 2.5 years later at a low per-student cost.
authors: CAMH Centre for Prevention Science, 100 Collip Cir, Ste 100, London, ON N6G 4X8, Canada. David_Wolfe@CAMH.net
authors: David A
authors: DA
authors: Wolfe
authors: Claire
authors: C
authors: Crooks
authors: Peter
authors: P
authors: Jaffe
authors: Debbie
authors: D
authors: Chiodo
authors: Ray
authors: R
authors: Hughes
authors: Wendy
authors: W
authors: Ellis
authors: Larry
authors: L
authors: Stitt
authors: Allan
authors: A
authors: Donner
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D016000:Cluster Analysis; D017280:Condoms / Q000706:statistics & numerical data; D003380:Courtship; D003479:Curriculum; D017579:Domestic Violence / Q000517:prevention & control*; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D009864:Ontario; D016730:Program Development; D015397:Program Evaluation; D016016:Proportional Hazards Models; D000297:Psychology, Adolescent; D012572:School Health Services / Q000458:organization & administration*; D019966:Substance-Related Disorders / Q000517:prevention & control