Psychiatric symptom patterns of chronic epileptics attending a neurological clinic: a controlled investigation.

The psychiatric morbidity of chronic epileptic out-patients unknown to psychiatric agencies was assessed using two questionnaire measures of psychopathology (GHQ and CCEI). Nearly half of the epileptics were classified as probable psychiatric cases. Psychiatric morbidity was both more prevalent and more severe in this group than in a comparison group of chronic neurological out-patients. Depression, anxiety and hysterical symptomatology were the commonest characteristics of psychiatrically impaired epileptics. The type and severity of epilepsy were found to influence both the degree and pattern of psychiatric morbidity. Contrary to previous findings, age of onset had no relation to psychopathology.