Females were more likely than males to experience all mental health problems except ASPD. Females had higher mean scores than males on the Social Interaction Anxiety Scale but not the Social Phobia Scale (Table 3). Females also had a higher prevalence of suicidal thoughts and behaviours than males (Table 3). A more detailed analysis of suicidal behaviours and associated characteristics amongst this sample is reported elsewhere (Maloney, Degenhardt, Darke, Mattick, & Nelson, 2007).