“…The prevalence and taxonomy of co-occurring mental disorders reported in this thesis strongly demonstrate the need to use screening measures that screen for "lower prevalence" disorders, such as psychotic disorders in this population. These disorders may be low prevalence in the general population at large, (0.45%, Morgan et al, 2011), but the results in this thesis support earlier research (Grella & Stein, 2006;Mortlock et al, 2011) and demonstrate psychotic disorders ! 121!…”