“…Some researchers note the importance of identifying comorbidity in ADHD cases, as it is an essential determining factor in the course of the disorder ( Bloemsma et al, 2013 , Elia et al, 2009 , Humphreys et al, 2012 , Rodríguez et al, 2014 ). Comorbidity has been reported to be associated with different disorders, such as learning difficulties, depression, oppositional defiant disorder, behavior disorders, as well as anxiety and mood disorders ( González-Castro et al, 2014 , Skirbekk et al, 2011 ). Regarding anxiety, comorbidity with ADHD is estimated at 20-25% ( Bloemsma et al, 2013 ).…”