Functional outcomes assessed by raters trained in using the Global Assessment of Functioning scale [43]. The GAF is an established measure of global psychosocial and occupational functioning, and is used to assess functional impairment on Axis-V of the Diagnostic and Statistical Manual of Mental Disorders [43–45]. The GAF has been used to assess functional outcomes in SMI. The GAF consists of a global judgment of psychological, social and occupational functioning, is rated on a scale ranging from 1 to 100 (1 = poor functioning; 100 = superior functioning). Final ratings are based on the rater’s combined impressions that pertain to symptom severity and functional impairment exhibited across occupational, interpersonal and social settings.
