Department of Child and Adolescent Healthcare，Department of Medical Psychology，Xinhua Hospital affiliated to Shanghai Jiaotong University School of Medicine，Ministry of Education-Shanghai Key Laboratory of Children’s Environmental Health，Shanghai 200092，China
Abstract：Objective To analyze the characteristics of the psychopathic traits in children and adolescents with conduct disorder（CD），oppositional defiant disorder（ODD）and attention-deficit hyperactivity disorder（ADHD），and explore the related pathological mechanism between the two disorders. Methods Antisocial Process Screening Device（APSD）was employed in the assessment of 213 children and adolescents，and the scores of callous and unemotion，narcissism and impulsivity were compared among groups. Results ① The scores of callous and unemotion in three groups of ADHD，ODD/CD and ADHD + ODD/CD were significantly higher than that in control group（P < 0.05）. The score of narcissism in ADHD + ODD group was significantly higher than those in other groups（P < 0.05），and the score of narcissism in ODD group was also significantly higher than that in control group（P < 0.05）. The scores of impulsivity in three groups were significantly higher than that in control group（P < 0.05）. ② The proportions of all the three traits were highest in ADHD + ODD/CD group（ ≥ 75% for all），and the proportions of coexistence were more than 60%，while those were lower in control group. The proportions of callous and unemotion in three groups were about 3 times that in control group. The proportions of narcissism were at the higher level in ODD/CD group and ADHD + ODD/CD group（ > 70%）， which were 2.4 to 2.8 times that in ADHD group and 4 to 5 times that in control group. The proportions of impulsivity in three groups were 2 to 3 times that in control group. The differences caused by narcissism in ODD/CD + ADHD group were the largest as compared with control group and ADHD group. Conclusion Callous and unemotion is one of the common psychopathic traits in children with ADHD and ODD/CD，while narcissism has higher specificity for the children with ODD/CD. The measurement of psychopathy has a high clinical value in evaluating whether the child is normal，pure ADHD or ADHD + CD/ODD.