Outcome measures’ effect sizes, <i>ES</i> (Cohen’s <i>d</i>) at pre-, post-treatment and follow-up.

NoteaAbbreviations: CY-BOCS = Children Yale-Brown Obsessive Compulsive Scale, C-GAS = Children’s Global Assessment Scale, ChOCI-R symptom/impairment = Children’s Obsessive Compulsive Inventory Revised symptom and impairment scales, COIS-R = Child Obsessive-Compulsive Impairment Scale Revised, SCAS = Spence Child Anxiety Scale, CDI-S = Children’s Depression Inventory – Short version, FAS-PR = Family Accommodation Scale Parent Rating, SDQ = Strength and Difficulties Questionnaire.