Attention Deficit Hyperactivity Disorder
Attention Deficit Hyperactivity Disorder (ADHD) is one of the most common of the psychiatric disorders that appear in childhood. Occurrence is somewhere between 3-5 % of children, with boys outnumbering girls. The number of children and adolescents affected by ADHD in the United States probably ranges from 1.4 to 2.2 million.
ADHD is generally characterized by inattention, distractibility, impulsivity, and hyperactivity that occur before age seven, continue for at least six months, and are not primarily due to other psychiatric disorders or environmental circumstances, such as reactions to family stresses, etc.
More than half of children with attention deficit disorder also have accompanying disorders, including anxiety, depression, and conduct disorders. Speech and learning disorders are also common in children with ADHD.