title: Concordance of the mini-Psychiatric Assessment Schedule for Adults who have Developmental Disabilities (PASADD) and the Brief Symptom Inventory.
abstract: BACKGROUND
  When assessing the mental health needs of people who have intellectual disabilities (ID) it is important to use measures that have good validity and reliability to ensure accurate case recognition and reliable and valid outcome data. Measures developed for this purpose tend to be self-report or by informant report. Multi-trait screening tools developed to identify psychological and psychiatric disorders in people who have ID tend to be informant based. Research examining the concordance of different tools has found this to be high but not for specific diagnoses. Multi-trait self-report measures are fewer and have not been compared with informant approaches. This study aims to examine the concordance between two multi-trait measures of mental health used with people who have ID. One administered to informants [the Mini-Psychiatric Assessment Schedule for Adults who have Developmental Disabilities (PASADD)] and one self-report [Brief Symptom Inventory (BSI)]
  
  
  METHODS
  The measures were completed with 109 adults who have ID and with someone who knows them well.
  
  
  RESULTS
  Level of agreement across the four scales in common was good for three. The poorest convergence was for the obsessive compulsive disorder sub-scales. However, a high level of concordance was found between most sub-scales.
  
  
  CONCLUSIONS
  The BSI and the PASSAD seem to be good indicators of psychiatric problems and psychological distress; however, similar to other multi-trait measures they did not demonstrate appropriate specificity for particular disorders.
authors.affiliation: Barnsley Adult Specialist Learning Disability Health Service, South West Yorkshire Partnership NHS Foundation Trust, The Keresforth Centre, Barnsley, UK; Clinical Psychology Unit, Department of Psychology, University of Sheffield, Sheffield, UK.
authors.forename: N
authors.initials: N
authors.lastname: Beail
authors.forename: K
authors.initials: K
authors.lastname: Mitchell
authors.forename: N
authors.initials: N
authors.lastname: Vlissides
authors.forename: T
authors.initials: T
authors.lastname: Jackson
mesh_terms: D000293:Adolescent; D000328:Adult; D002658:Developmental Disabilities / Q000150:complications*; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000150:complications*; D007406:Interview, Psychological / Q000379:methods*; D008297:Male; D001523:Mental Disorders / Q000150:complications* / Q000175:diagnosis*; D008875:Middle Aged; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data*; D011594:Psychometrics; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires; D055815:Young Adult
keywords: Brief Symptom Inventory; PASSAD; assessment; intellectual disability; mental health; psychiatric disorders