发病原因很多，是儿童青少年时期长见病有的甚至廷续到成年。近年来由于环境、教育等因素，注意力缺陷障碍（ADD）的发病率有逐年增高的趋势。
注意力障碍/多动症 attention-deficit/hyperactivity disorder
注意力障碍及过动异常 attention deficit hyperactivity disorder ; ADHD
注意力障碍多动症 attention deficit hyperactivity disorder
注意力缺陷多动障碍 ADHD ; attention deficit hyperactivity disorder ; attention deficit hyperactivist order
注意力缺陷障碍 ADD ; Attention deficit disorder ; craigslist add
注意力缺陷障碍症 Attention Deficit Disorder ; ADD
患有注意力缺陷障碍症 Attention Deficit Disorder ; ADD
注意力欠缺过动障碍 adhd
五年级时，早期存在注意力障碍的儿童取得的学习成绩和阅读成绩，都低于同龄儿童。
By fifth grade, children with early attention difficulties had lower grades and reading achievement scores than their peers.
作为五年级学生，有早期注意力障碍的孩子的平均阅读分数至少比同龄孩子低3%，学习成绩至少比同龄孩子低8%。
As fifth-graders, children with early attention problems obtained average reading scores at least 3% lower than their contemporaries' and grades at least 8% lower than those of their peers.
南澳大利亚注意力障碍协会(adasa)。
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