title: The concurrent validity of the Global Assessment of Functioning (GAF).
abstract: BACKGROUND
  Few studies of the validity of the Global Assessment of Functioning (GAF) have been published and none has shown how GAF ratings are associated with concurrent ratings of symptoms and social functioning. This article provides such data.
  
  
  METHODS
  Patients suffering from schizophrenia were assessed at admission to hospital and at six- and 12-month follow-up, using the GAF, the Scale for the Assessment of Positive Symptoms (SAPS), the Scale for the Assessment of Negative Symptoms (SANS) and the Social Behaviour Schedule.
  
  
  RESULTS
  GAF ratings were highly correlated with ratings of symptoms and social behaviour at both follow-ups but not at initial assessment, although the inter-rater reliabilities for the measures were good.
  
  
  CONCLUSIONS
  The GAF can be rated reliably after minimal training. It provides a valid summary of symptoms and social functioning among schizophrenic patients provided they are not assessed when suffering from acute psychotic episodes.
authors.affiliation: School of Psychology, University of Wales, Bangor, UK. mike.startup@newcastle.edu.au
authors.forename: Mike
authors.initials: M
authors.lastname: Startup
authors.forename: Mike C
authors.initials: MC
authors.lastname: Jackson
authors.forename: Sue
authors.initials: S
authors.lastname: Bendix
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D015928:Cognitive Behavioral Therapy; D005260:Female; D005500:Follow-Up Studies; D006760:Hospitalization; D006778:Hospitals, Psychiatric; D006801:Humans; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D011618:Psychotic Disorders / Q000175:diagnosis* / Q000453:epidemiology / Q000209:etiology*; D015203:Reproducibility of Results; D012559:Schizophrenia / Q000534:rehabilitation / Q000628:therapy*; D012565:Schizophrenic Psychology; D012919:Social Behavior; D011795:Surveys and Questionnaires