The relationship between motor milestone achievement and childhood motor deficits in children with Attention Deficit Hyperactivity Disorder (ADHD) and children with Developmental Coordination Disorder

The prevalence of motor impairment is high in ADHD, but we do not know if this stems from infancy. 1) to compare the acquisition milestones across three groups: Typically Developing (TD), Attention Deficit Hyperactivity Disorder (ADHD) and Developmental Coordination (DCD); 2) determine relationship between current ability ADHD characteristics children with ADHD. parents aged 8–16 years (ADHD, N = 100; DCD, 66; TD, 40) completed online questionnaires: Motor milestone questionnaire; Questionnaire (DCDQ’07) (concurrent ability); Conners 3 Parent Rating Scale Long Form (ADHD characteristics). When considered as a group, group achieved within typical timeframe, despite concurrent impairments. was associated characteristics. Latent Profile Analysis demonstrated that 56 % 48 DCD shared same profile achievement, Unlike often observed evident It also part phenotype. Individual differences analysis broad heterogeneity