[Violent behavior of patients--is it predictable?].

In previous research on prediction of violent behaviour in patients some of the most important limitations have been lack of precision in defining violent behaviour, unsystematic registration of violence, and the fact that the prediction has been made valid for contexts other than that in which the original assessment was made. Of the neurobiological factors associated with violence, scientists have recently focused upon the serotonergic system in the central nervous system as being important. The authors review the literature on individual predictors of violent behaviour. Strong predictors seem to be previous violent behaviour, a high degree of hostility, suspiciousness and grandiosity, and current alcohol or drug abuse. The article includes suggestions for future research, and concludes with a presentation of guidelines for clinical assessment of risk of violence, with emphasis on recent events and observed behaviour.