nMale:female ratio from
4:1 to 9:1 (DSM-IV)
nEstimates of prevalence
in school age children range from 3-5% (DSM-IV) to 8-12% (Biederman
and Faraone 2005)
nEtiology not known
(environmental, genetic, developmental, family dysfunction)
nDiagnosis is clinical
(no pathognomonic physical or laboratory findings)
nDiagnosis applies to
different levels of severity
n