title: QOLIBRI overall scale: a brief index of health-related quality of life after traumatic brain injury.
abstract: BACKGROUND
  The quality of life after brain injury (QOLIBRI) scale is a recently developed instrument that provides a profile of health-related quality of life (HRQoL) in domains typically affected by brain injury. However, for global assessment it is desirable to have a brief summary measure. This study examined a 6-item QOLIBRI overall scale (QOLIBRI-OS), and considered whether it could provide an index of HRQoL after traumatic brain injury (TBI).
  
  
  METHODS
  The properties of the QOLIBRI-OS were studied in a sample of 792 participants with TBI recruited from centres in nine countries covering six languages. An examination of construct validity was undertaken on a subsample of 153 participants recruited in Germany who had been assessed on two relevant brief quality of life measures, the satisfaction with life scale and the quality of life visual analogue scale.
  
  
  RESULTS
  The reliability of the QOLIBRI-OS was good (Cronbach's α=0.86, test-retest reliability =0.81) and similar in participants with higher and lower cognitive performance. Factor analysis indicated that the scale is unidimensional. Rasch analysis also showed a satisfactory fit with this model. The QOLIBRI-OS correlates highly with the total score from the full QOLIBRI scale (r=0.87). Moderate to strong relationships were found among the QOLIBRI-OS and the extended glasgow outcome scale, short-form-36, and hospital anxiety and depression scale (r=0.54 to -0.76). The QOLIBRI-OS showed good construct validity in the TBI group.
  
  
  CONCLUSIONS
  The QOLIBRI-OS assesses a similar construct to the QOLIBRI total score and can be used as a brief index of HRQoL for TBI.
authors.affiliation: Department of Psychology, University of Stirling, Stirling FK9 4LA, UK.
authors.forename: Nicole
authors.initials: N
authors.lastname: von Steinbuechel
authors.forename: Lindsay
authors.initials: L
authors.lastname: Wilson
authors.forename: Henning
authors.initials: H
authors.lastname: Gibbons
authors.forename: Holger
authors.initials: H
authors.lastname: Muehlan
authors.forename: Holger
authors.initials: H
authors.lastname: Schmidt
authors.forename: Silke
authors.initials: S
authors.lastname: Schmidt
authors.forename: Nadine
authors.initials: N
authors.lastname: Sasse
authors.forename: Sanna
authors.initials: S
authors.lastname: Koskinen
authors.forename: Jaana
authors.initials: J
authors.lastname: Sarajuuri
authors.forename: Stefan
authors.initials: S
authors.lastname: Höfer
authors.forename: Monika
authors.initials: M
authors.lastname: Bullinger
authors.forename: Andrew
authors.initials: A
authors.lastname: Maas
authors.forename: Edmund
authors.initials: E
authors.lastname: Neugebauer
authors.forename: Jane
authors.initials: J
authors.lastname: Powell
authors.forename: Klaus
authors.initials: K
authors.lastname: von Wild
authors.forename: George
authors.initials: G
authors.lastname: Zitnay
authors.forename: Wilbert
authors.initials: W
authors.lastname: Bakx
authors.forename: Anne-Lise
authors.initials: AL
authors.lastname: Christensen
authors.forename: Rita
authors.initials: R
authors.lastname: Formisano
authors.forename: Graeme
authors.initials: G
authors.lastname: Hawthorne
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Truelle
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001930:Brain Injuries / Q000150:complications / Q000523:psychology*; D005260:Female; D023261:Glasgow Outcome Scale / Q000706:statistics & numerical data; D006304:Health Status; D006801:Humans; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care / Q000379:methods / Q000706:statistics & numerical data; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data*; D011788:Quality of Life / Q000523:psychology*; D015203:Reproducibility of Results