title: Refining a measure of brain injury sequelae to predict postacute rehabilitation outcome: rating scale analysis of the Mayo-Portland Adaptability Inventory.
abstract: OBJECTIVE
  Evaluate the psychometric properties of the Mayo-Portland Adaptability Inventory (MPAI).
  
  
  METHODS
  Rating scale (Rasch) analysis of MPAI and principal component analysis of residuals; the predictive validity of the MPAI measures and raw scores was assessed in a sample from a day rehabilitation program.
  
  
  METHODS
  Outpatient brain injury rehabilitation.
  
  
  METHODS
  305 persons with brain injury.
  
  
  RESULTS
  A 22-item scale reflecting severity of sequelae of brain injury that contained a mix of indicators of impairment, activity, and participation was identified. Scores and measures for MPAI scales were strongly correlated and their predictive validities were comparable.
  
  
  CONCLUSIONS
  Impairment, activity, and participation define a single dimension of brain injury sequelae. The MPAI shows promise as a measure of this construct.
authors.affiliation: Mayo Medical Center, Rochester, Minnesota 55905, USA.
authors.forename: J F
authors.initials: JF
authors.lastname: Malec
authors.forename: A M
authors.initials: AM
authors.lastname: Moessner
authors.forename: M
authors.initials: M
authors.lastname: Kragness
authors.forename: M D
authors.initials: MD
authors.lastname: Lezak
mesh_terms: D000203:Activities of Daily Living; D000208:Acute Disease; D000223:Adaptation, Psychological; D000328:Adult; D000368:Aged; D001930:Brain Injuries / Q000175:diagnosis / Q000523:psychology* / Q000534:rehabilitation*; D005260:Female; D006801:Humans; D015601:Injury Severity Score; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011379:Prognosis; D011569:Psychiatric Status Rating Scales; D011594:Psychometrics; D012050:Rehabilitation, Vocational; D015203:Reproducibility of Results; D012494:Sampling Studies; D013997:Time Factors