title: Equating activities of daily living outcome measures: the Functional Independence Measure and the Korean version of Modified Barthel Index.
abstract: OBJECTIVE
  To create a crosswalk between the Functional Independence Measure (FIM) motor items and the Korean version of the Modified Barthel Index (K-MBI).
  
  
  METHODS
  Korean community-dwelling adult patients (n = 276) completed the FIM and K-MBI on the same day in outpatient rehabilitation hospitals. We used a single group design with the Rasch common person equating and conducted a factor analysis of the co-calibrated item pool using the two measures. Rasch analysis was used to investigate the psychometrics of the equated test items in the identified factor structure(s). The correlation between FIM raw scores and converted K-MBI scores was examined.
  
  
  RESULTS
  Three measurement constructs were identified: self-care, mobility, involuntary movement. The equated test items in the three constructs demonstrated good person separation reliability (r = 0.94-0.96) and good internal consistency (Cronbach's alpha =0.93-0.97). The three crosswalks between the FIM raw scores and converted K-MBI scores demonstrated good correlations (r = 0.91-0.93, all p < 0.0001).
  
  
  CONCLUSIONS
  The Rasch equating method successfully created three crosswalks between the FIM motor items and K-MBI, with the equated test items demonstrating good psychometrics. The crosswalks would address the incomparable scoring systems between the FIM motor items and K-MBI. Implications for Rehabilitation The three crosswalk tables (scoring tables) would allow clinicians to compare or translate a patient's motor scores between the FIM and K-MBI. The crosswalk tables would allow health-care administrators to track patients' functional status across various rehabilitation facilities that exclusively use the FIM or K-MBI.
authors.affiliation: a Division of Rehabilitation Sciences , University of Texas Medical Branch , Galveston , TX , USA.
authors.forename: Ickpyo
authors.identifier: http://orcid.org/0000-0001-5404-7646
authors.initials: I
authors.lastname: Hong
authors.affiliation: b Department of Occupational Therapy , Wonkwang University , Iksan , South Korea.
authors.forename: Hee-Soon
authors.identifier: http://orcid.org/0000-0003-4712-9808
authors.initials: HS
authors.lastname: Woo
authors.affiliation: c Department of Occupational Therapy , Jeonju University , Jeonju , South Korea.
authors.forename: Sunhwa
authors.identifier: http://orcid.org/0000-0001-7540-5879
authors.initials: S
authors.lastname: Shim
authors.affiliation: a Division of Rehabilitation Sciences , University of Texas Medical Branch , Galveston , TX , USA.
authors.forename: Chih-Ying
authors.identifier: http://orcid.org/0000-0003-4817-554X
authors.initials: CY
authors.lastname: Li
authors.affiliation: d College of Public Health and Health Professions , University of Florida , Gainesville , FL , USA.
authors.forename: Lim
authors.identifier: http://orcid.org/0000-0003-3688-9385
authors.initials: L
authors.lastname: Yoonjeong
authors.affiliation: e Division of Occupational Therapy , Medical University of South Carolina , Charleston , SC , USA.
authors.forename: Craig A
authors.identifier: http://orcid.org/0000-0001-8617-4092
authors.initials: CA
authors.lastname: Velozo
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D020820:Dyskinesias / Q000175:diagnosis*; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D057187:Independent Living; D008297:Male; D008875:Middle Aged; D051346:Mobility Limitation; D017063:Outcome Assessment, Health Care; D011594:Psychometrics / Q000379:methods*; D000066768:Rehabilitation Research; D015203:Reproducibility of Results; D056910:Republic of Korea; D012648:Self Care / Q000379:methods*; D014177:Translations
keywords: Activities of daily living; outcomes assessment; psychometrics; rehabilitation