A clinical study of 724 children (boys/girls (B/G) 504/220) was conducted to study the relationship between attention deficit hyperactivity disorder (ADHD) and оppositional behavior: 471 children with ADHD (B/G=381/90) (clinical group) at the age of 8.04±3.68 years, 253 a child without ADHD (B/G=123/130) (control group) at the age of 8.06±2.31 years.
In accordance with the clinical protocol and instructions for use a method for diagnosing ADHD in children containing the NICHQ Vanderbilt Assessment Scales (NICHQ VAS) was used to assess the severity of ADHD symptoms and comorbid оppositional behavior and others behavioral disorders. Determined that oppositional behavior is typical for children with ADHD in all age groups; no significant difference was found (p>0.05). Significant correlations were revealed between the severity of oppositional behavior and all symptoms of ADHD: attention disorders (r=0.41; p<0.01), hyperactivity (r=0.42 p<0.01), impulsivity (r=0.46, p<0.01), hyperactivity + impulsivity (r=0.51, p<0.01), attention disorders + hyperactivity + impulsivity (r=0.52, p<0.01) There was no gender difference in the models of oppositional behavior formation in children with ADHD (p>0.05). A significant correlation was found between the severity of oppositional behavior and the symptoms of conduct disorder (r=0.54, p<0.01). A predictive model with a high statistical score (AUC = 0.92) has been developed to determine the possibility of developing oppositional disorder in children with ADHD.