Attention-deficit/hyperactivity disorder (AD/HD or ADHD) is a neuron behavioral developmental disorder. It is the most commonly diagnosed psychiatric disorder in children affecting about 3 to 5% of children globally with symptoms starting before seven years of age. It is characterized by a persistent pattern of impulsiveness and inattention, with or without a component of hyperactivity. ADHD is diagnosed twice as frequently in boys as in girls, though studies suggest this discrepancy may be due to subjective bias. ADHD is generally a chronic disorder with 30 to 50% of those individuals diagnosed in childhood continuing to have symptoms into adulthood. As they mature, adolescents and adults with ADHD are likely to develop coping mechanisms to compensate for their impairment.
ADHD: Commonly diagnosed disorder in children. Study links childhood deaths and stimulants
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