Is the Cool Kids programme working in outpatient psychiatric clinics? A Danish naturalistic effectiveness study.

The intervention significantly decreased the interference caused by anxiety symptoms in both the children's and the parents' lives from pre- to post-treatment and results were maintained during the 3-month follow up. Nevertheless, no additional significant reduction in interference was detected in the follow up contrary to the results from previous efficacy studies. Our results confirm that Cool Kids can be successfully implemented in clinical practice.