Wolfe 2003.
| Methods | RCT. Random assignment of participants to intervention or control modified to reflect 2:1 (intervention:control) ratio | |
| Participants | 191 teenagers (aged 14‐16 years, mean 15.18 years, SD 1.09; approximately 50% males and 50% females) with history of child maltreatment recruited from Child Protection Services in Canada who may be at higher risk of violence (Secondary prevention) | |
| Interventions | Intervention: Youth Relationships Project focusing on increasing knowledge and awareness of dating violence, skills development and social action to prevent dating violence. Delivered in 18 sessions (duration unclear) over 4 months by social workers and community professionals who had received 10 hours of training over 2 days. 96 students Control: no intervention. 62 students |
|
| Outcomes | Rates of abuse experienced and perpetrated and attitudes towards dating violence as measured using the Conflict in Adolescent Dating Relationships Inventory, Trauma Symptoms Checklist and Adolescent Interpersonal Competence Questionnaire | |
| Follow‐up | Follow‐up bi‐monthly after completing the intervention. Mean follow‐up duration was 16 months (with mean of 4.7 follow‐up assessments in total per person) | |
| Notes | ‐ | |
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | Unclear risk | Study had a "random" design |
| Allocation concealment (selection bias) | Unclear risk | Not stated |
| Incomplete outcome data (attrition bias) All outcomes | Low risk | Attrition rate: 17% (33/191). Unlikely to affect results |
| Selective reporting (reporting bias) | Low risk | All outcomes reported fully (n and % for categorical scales; number of participants, means and SDs for continuous scales) |
| Blinding of participants and personnel (performance bias) All outcomes | Low risk | Blinding not possible, but performance bias minimised by training of staff delivering interventions, use of a detailed manual, and audiotaping and reviewing of sessions to assess adherence to protocol |
| Blinding of outcome assessment (detection bias) All outcomes | Unclear risk | Not stated |