title: Comparing 2 versions of the Chedoke Arm and Hand Activity Inventory with the Action Research Arm Test.
abstract: OBJECTIVE
  The Chedoke Arm and Hand Activity Inventory (CAHAI) is a new, validated upper-limb measure that uses a 7-point quantitative scale in order to assess functional recovery of the arm and hand after a stroke. The purposes of this study were: (1) to determine whether the longitudinal validity of scores on 2 versions of a new upper-limb measure, the CAHAI (CAHAI-9 and CAHAI-13), was greater than that of scores on the Action Research Arm Test (ARAT) and (2) to determine whether the cross-sectional and longitudinal validity of the CAHAI-13 scores was greater than that of the CAHAI-9 scores.
  
  
  METHODS
  One hundred five people with upper-limb dysfunction following a stroke were stratified into 2 impairment groups (mild to moderate and severe), which were expected to change by different amounts.
  
  
  METHODS
  The CAHAI-13 and ARAT were administered twice (time between assessments varied from 2 to 6 weeks). Receiver operating characteristic curves, Pearson product moment coefficient of correlation, and regression analyses were used.
  
  
  RESULTS
  Receiver operating characteristic curve areas (CAHAI-13=0.86, CAHAI-9=0.82, ARAT=0.72) were significantly greater for the CAHAI versions. Scores on both CAHAI versions had identical levels of cross-sectional validity.
  
  
  CONCLUSIONS
  Both CAHAI versions demonstrated more sensitivity to change than the ARAT. It remains unclear whether the CAHAI-9 provides precise estimates of CAHAI-13 scores at the individual level.
authors.affiliation: McMaster University, Hamilton, Ontario, Canada. barreca@hhsc.ca
authors.forename: Susan R
authors.initials: SR
authors.lastname: Barreca
authors.forename: Paul W
authors.initials: PW
authors.lastname: Stratford
authors.forename: Lisa M
authors.initials: LM
authors.lastname: Masters
authors.forename: Cynthia L
authors.initials: CL
authors.lastname: Lambert
authors.forename: Jeremy
authors.initials: J
authors.lastname: Griffiths
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D001132:Arm / Q000503:physiopathology*; D003430:Cross-Sectional Studies; D005260:Female; D015577:Geriatric Assessment / Q000379:methods; D006225:Hand / Q000503:physiopathology*; D006801:Humans; D038801:International Classification of Diseases; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D009048:Motor Skills; D015588:Observer Variation; D009864:Ontario; D010808:Physical Examination / Q000379:methods* / Q000592:standards; D011594:Psychometrics; D012372:ROC Curve; D020127:Recovery of Function; D012044:Regression Analysis; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D020521:Stroke / Q000145:classification* / Q000175:diagnosis / Q000503:physiopathology*; D000071939:Stroke Rehabilitation; D013997:Time Factors