OPEN MINDS, The Behavioral Health & Social Service Industry Analyst Industry Statistics Eight point two percent (8.2%), approximately 4.1 million children, in the civilian, non- institutionalized population of the United States have a reported mental, emotional or functional disability. In a study of data collected by the National Center for Health Statistics, children were divided into two major groups: a disability group containing children identified as having reported mental, emotional or functional limitations, and a reference group composed of children not identified as having these limitations. To measure whether a . . .