title: Psychometric evaluation and calibration of health-related quality of life item banks: plans for the Patient-Reported Outcomes Measurement Information System (PROMIS).
abstract: BACKGROUND
  The construction and evaluation of item banks to measure unidimensional constructs of health-related quality of life (HRQOL) is a fundamental objective of the Patient-Reported Outcomes Measurement Information System (PROMIS) project.
  
  
  OBJECTIVE
  Item banks will be used as the foundation for developing short-form instruments and enabling computerized adaptive testing. The PROMIS Steering Committee selected 5 HRQOL domains for initial focus: physical functioning, fatigue, pain, emotional distress, and social role participation. This report provides an overview of the methods used in the PROMIS item analyses and proposed calibration of item banks.
  
  
  METHODS
  Analyses include evaluation of data quality (eg, logic and range checking, spread of response distribution within an item), descriptive statistics (eg, frequencies, means), item response theory model assumptions (unidimensionality, local independence, monotonicity), model fit, differential item functioning, and item calibration for banking.
  
  
  CONCLUSIONS
  Summarized are key analytic issues; recommendations are provided for future evaluations of item banks in HRQOL assessment.
authors: National Cancer Institute, NIH, Bethesda, Maryland 20892, USA. reeveb@mail.nih.gov
authors: Bryce B
authors: BB
authors: Reeve
authors: Ron D
authors: RD
authors: Hays
authors: Jakob B
authors: JB
authors: Bjorner
authors: Karon F
authors: KF
authors: Cook
authors: Paul K
authors: PK
authors: Crane
authors: Jeanne A
authors: JA
authors: Teresi
authors: David
authors: D
authors: Thissen
authors: Dennis A
authors: DA
authors: Revicki
authors: David J
authors: DJ
authors: Weiss
authors: Ronald K
authors: RK
authors: Hambleton
authors: Honghu
authors: H
authors: Liu
authors: Richard
authors: R
authors: Gershon
authors: Steven P
authors: SP
authors: Reise
authors: Jin-shei
authors: JS
authors: Lai
authors: David
authors: D
authors: Cella
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002138:Calibration; D019992:Databases as Topic; D005069:Evaluation Studies as Topic; D005260:Female; D006304:Health Status; D006801:Humans; D007256:Information Systems; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care / Q000379:methods*; D011594:Psychometrics; D011788:Quality of Life; D012650:Self Disclosure; D011795:Surveys and Questionnaires / Q000592:standards; D014481:United States