title: Psychometric properties of the outcome questionnaire-45.2: the Norwegian version in an international context.
abstract: OBJECTIVE
  Monitoring of ongoing psychotherapy is of crucial importance in improving the quality of mental health care by detecting therapies being off track, which requires that the instrument used is psychometrically sound. This study investigates the psychometric properties of the Norwegian version of the Outcome Questionnaire 45.2 (OQ-45) and situates the results in an international context.
  
  
  METHODS
  Data from one non-clinical sample (N = 338) and one clinical sample (N = 560) were compared to international samples investigating reliability, cut-offs, and factor structure.
  
  
  RESULTS
  The results show adequate reliability and concurrent validity.
  
  
  CONCLUSIONS
  The means, clinical cut-offs, and the reliable change index vary across countries. However, the means of the OQ-45 for nonclinical samples correlate highly with external values of national well-being, indicating that the OQ-45 is a valid instrument internationally. The factor analyses in the present study do not confirm the hypothesized factor structure of the OQ-45, but are similar to the results internationally.
authors.affiliation: a Outpatient Clinic, Modum Bad Psychiatric Center , Vikersund , Norway.
authors.forename: Ingunn
authors.initials: I
authors.lastname: Amble
authors.forename: Tore
authors.initials: T
authors.lastname: Gude
authors.forename: Sven
authors.initials: S
authors.lastname: Stubdal
authors.forename: Tuva
authors.initials: T
authors.lastname: Oktedalen
authors.forename: Anne Marie
authors.initials: AM
authors.lastname: Skjorten
authors.forename: Bror Just
authors.initials: BJ
authors.lastname: Andersen
authors.forename: Ole André
authors.initials: OA
authors.lastname: Solbakken
authors.forename: Hanne H
authors.initials: HH
authors.lastname: Brorson
authors.forename: Espen
authors.initials: E
authors.lastname: Arnevik
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Lambert
authors.forename: Bruce E
authors.initials: BE
authors.lastname: Wampold
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000628:therapy*; D008875:Middle Aged; D009664:Norway; D017063:Outcome Assessment, Health Care / Q000379:methods*; D011594:Psychometrics / Q000295:instrumentation*; D011613:Psychotherapy / Q000592:standards*; D011795:Surveys and Questionnaires / Q000592:standards*; D055815:Young Adult
keywords: OQ-45; Outcome Questionnaire-45; feedback; psychometric properties; psychotherapy monitoring