By fifth grade, children with early attention difficulties had lower grades and reading achievement scores than their peers.

到五年级时，有早期注意力障碍的儿童的学习成绩和阅读能力均低于同龄人。

Lower reading achievement scores and grades in fifth grade contributed to reduced grades in middle school and thereby contributed to a 40% lower high school graduation rate.

五年级的阅读成绩和学分成绩较低导致初中的成绩不好，因此高中毕业率也会低 40%。