The DSM-IV (Diagnostic and Statistical Manual of Mental Disorders, fourth edition) contains the Diagnostic Criteria for the most common mental disorders including: description, diagnosis, treatment, and research findings. Below is the Diagnostic Criteria for diagnosing Attention Deficit (Hyperactivity) Disorder:
A. Either (1) or (2)
1) Six or more of the following symptoms of inattention have persisted for at least six months to a degree that is maladaptive and inconsistent with the developmental level:
2) Six or more of the following symptoms of hyperactivity-impulsivity have persisted for at least 6 months to a degree that is maladaptive and inconsistent with the developmental level:
B. Some hyperactivity – impulsive or inattentive symptoms that cause impairment were present before the age of 7 years.
C. Some impairment from the symptoms is present in more than two or more settings (e.g. at school or work or at home).
D. There must be clear evidence of clinically significant impairment in social, academic, or occupational functioning.
E. The symptoms do not occur exclusively during the course of a Pervasive Developmental Disorder, Schizophrenia, or other Psychotic Disorder, and are not better accounted for by another mental disorder (e.g. Mood Disorder, Anxiety Disorder, Dissociative Disorder, or a Personality Disorder).
Based on these criteria, three types of ADHD are identified:
- ADHD, Combined Type: if both criteria 1A and 1B are met for the past 6 months
- ADHD, Predominantly Inattentive Type: if criterion 1A is met but criterion 1B is not met for the past six months
- ADHD, Predominantly Hyperactive-Impulsive Type: if Criterion 1B is met but Criterion 1A is not met for the past six months.
The above information has been printed from the American Psychiatric Association: Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision. Washington, DC, American Psychiatric Association, 2000.