Objective:To examine the role of dopamine D4 receptor gene(DRD4) in attention deficit hyperactivity disorder(ADHD) with/without disruptive behavior disorder(DBD) by focusing on a-521C/T SNP within the promoter region of this gene.Methods:A total of 401 DSM-Ⅳ ADHD children(including 284 trios) of Chinese Han descent were genotyped.Chi-square test and the transmission disequilibrium test(TDT) were used to test for associations in ADHD with and without DBD respectively.Results:In the comparison of ADHD with(n=...
注意缺陷多动障碍(attention deficit hyperactivi-ty d isorder,ADHD)是最常见的学龄期儿童行为问题,该症可引起社会适应不良,患儿罹患其他精神障碍的风险增加[1]。美国《精神障碍诊断与统计手册(第4版)》(DSMⅣ-)将包括对立违抗性障碍(oppo-sitional defiant d isorder,ODD)?