2.2.3. Substance use
The Comprehensive Assessment of Symptoms and History
(CASH; Andreasen, 1987 ) is a semi-structured diagnostic interview.
The CASH section on substance use was administered to assess
past and current substance use of the patient. The section consists
of 35 items on the use of alcohol, sof t drugs (e.g. cannabis) hard
drugs (e.g. amphetamines, cocaine), nicotine and caffeine. For the
current study, use of any substance in the previous month was
used as a dichotomous variable in the prediction of aggression.