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Undifferentiated attention-deficit disorder (UADD)

Undifferentiated attention-deficit disorder (UADD): This term was first introduced in the DSM-III-R, the 1987 edition. This was a miscellaneous category, and no formal diagnostic criteria were provided. UADD is approximately the predominantly inattentive type of ADHD in the DSM-IV-TR. The DSM-III-R diagnosis of attention-deficit hyperactivity disorder required hyperactive-impulsive symptoms in addition to the inattentive symptoms.