It typically presents itself during childhood, and is characterized by a persistent pattern of inattention and/or hyperactivity, as well as forgetfulness, poor impulse control or impulsivity,
and distractibility.
ADHD is currently considered to be a persistent
and chronic condition for which no medical cure is available, although medication can be prescribed.The estimated contribution of non genetic factors to the contribution of all cases of ADHD is 20 percent.