“…In this cohort, its prevalence is about 2-16%, depending on the diagnostic criteria and the studied population [46] (for instance, 10% in North Carolina [45], 6.8% in Australia [20], 7-10% in Spain [24] and, specifically, 6.66% in Castilla y León [48], where patients in our study are from). However, even though the treatment of ADHD is well-defined for the known types-inattentive, hyperactive-impulsivity and combined-the fact that its etiology [29,11,22,23,21,9] is not completely understood explains the absence of a simple standard diagnostic method.…”