A meta-analysis of behavioral parent training for children with attention deficit hyperactivity disorder

► Behavioral parent training is an effective intervention for children with attention deficit hyperactivity disorder, with an overall moderate effect size at post-treatment and a small effect size at follow-up. ► Sustainability of the effects over time is an important issue that awaits further scrutiny. ► The effect of behavioral parent training decreases in children with attention deficit hyperactivity disorder comorbid with other behavioral problems.