A 14-week randomized clinical trial ( Pediatric Obsessive-Compulsive Disorder Treatment Study for Young Children [ POTS Jr ] ) conducted at 3 academic medical centers between 2006 and 2011 , involving 127 pediatric outpatients 5 to 8 years of age who received a primary diagnosis of OCD and a Children 's Yale-Brown Obsessive Compulsive Scale total score of 16 or higher .