title: Putting the 'Q' in depression QALYs: a comparison of utility measurement using EQ-5D and SF-6D health related quality of life measures.
abstract: BACKGROUND
  Generic health preference measures that capture quality of life improvements in depression are important for economic analysis of new technologies.
  
  
  OBJECTIVE
  To compare two widely used preference measures, the EQ-5D and SF-6D, in terms of their dimensions and health utility values.
  
  
  METHODS
  EQ-5D and SF-6D data collected from 114 patients with depression, who participated in a cluster, randomised controlled trial to evaluate a collaborative care intervention in UK, primary care practices. Utilities were examined across the whole sample and by level of depression severity using the PHQ-9.
  
  
  RESULTS
  Depression was associated with disutility at baseline. At 3 month follow-up mean utility increased 0.147 for EQ-5D and 0.082 for SF-6D. Health gains were observed in patients in remission from depression and those with the mildest level of depression severity.
  
  
  CONCLUSIONS
  Both generic preference measures were sensitive to health gains in depression within a relatively short follow-up period; larger health gain was observed for the EQ-5D.
authors.affiliation: Dept. of Health Sciences, University of York, York, YO10 5DD, UK. rcm504@york.ac.uk
authors.forename: Rachel
authors.initials: R
authors.lastname: Mann
authors.forename: Simon
authors.initials: S
authors.lastname: Gilbody
authors.forename: David
authors.initials: D
authors.lastname: Richards
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003362:Cost-Benefit Analysis / Q000706:statistics & numerical data*; D003865:Major Depressive Disorder / Q000175:diagnosis* / Q000628:therapy; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D005500:Follow-Up Studies; D006304:Health Status; D006801:Humans; D008297:Male; D008875:Middle Aged; D011320:Primary Health Care; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data; D011788:Quality of Life / Q000523:psychology*; D019057:Quality-Adjusted Life Years; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires; D006113:United Kingdom