Attention-deficit hyperactivity disorder (AD/HD) AD/HD is defined as a pattern of behaviors in which a child shows, usually before the age of 7,
developmentally inappropriate levels of inattention, impulsivity, or hyperactivity. It is the most common mental health problem of childhood, affecting
3% to 5% of the population, and is considerably more common in boys than in girls. The behavior of children with ADHD often results in serious
disturbances in their relationships with parents, teachers, peers, and siblings, as well as academic problems. The symptoms and criteria for a
diagnosis of ADHD from the Diagnostic and Statistical Manual of The American Psychiatric Association are described below. A child must show
symptoms that cause problems and are present to a greater degree than other same age children.
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