figure 16.2 Prison and mental health According to studies conducted in several Western countries, psychological disorders are much more prevalent in prison populations than in the general population. For example, schizophrenia is four times more common and personality disorders (particularly antisocial personality disorder) are five times more common among prisoners than among nonprisoners. (Information from: Andreoli et al., 2014; Butler et al., 2006; Fazel & Danesh, 2002.)