title: Measurement properties of the Spinal Cord Injury-Functional Index (SCI-FI) short forms.
abstract: OBJECTIVE
  To evaluate the psychometric properties of the Spinal Cord Injury-Functional Index (SCI-FI) short forms (basic mobility, self-care, fine motor, ambulation, manual wheelchair, and power wheelchair) based on internal consistency; correlations between short forms banks, full item bank forms, and a 10-item computer adaptive test version; magnitude of ceiling and floor effects; and test information functions.
  
  
  METHODS
  Cross-sectional cohort study.
  
  
  METHODS
  Six rehabilitation hospitals in the United States.
  
  
  METHODS
  Individuals with traumatic spinal cord injury (N=855) recruited from 6 national Spinal Cord Injury Model Systems facilities.
  
  
  METHODS
  Not applicable.
  
  
  METHODS
  SCI-FI full item bank, 10-item computer adaptive test, and parallel short form scores.
  
  
  RESULTS
  The SCI-FI short forms (with separate versions for individuals with paraplegia and tetraplegia) demonstrate very good internal consistency, group-level reliability, excellent correlations between short forms and scores based on the total item bank, and minimal ceiling and floor effects (except ceiling effects for persons with paraplegia on self-care, fine motor, and power wheelchair ability and floor effects for persons with tetraplegia on self-care, fine motor, and manual wheelchair ability). The test information functions are acceptable across the range of scores where most persons in the sample performed.
  
  
  CONCLUSIONS
  Clinicians and researchers should consider the SCI-FI short forms when computer adaptive testing is not feasible.
authors.affiliation: Center for Rehabilitation Outcomes Research, Rehabilitation Institute of Chicago, Chicago, IL; Department of Physical Medicine and Rehabilitation, Feinberg School of Medicine, Northwestern University, Chicago, IL. Electronic address: a-heinemann@northwestern.edu.
authors.forename: Allen W
authors.initials: AW
authors.lastname: Heinemann
authors.affiliation: Rehabilitation Medicine, Icahn School of Medicine at Mount Sinai, New York, NY.
authors.forename: Marcel P
authors.initials: MP
authors.lastname: Dijkers
authors.affiliation: Health and Disability Research Institute, Boston University School of Public Health, Boston, MA.
authors.forename: Pengsheng
authors.initials: P
authors.lastname: Ni
authors.affiliation: Department of Rehabilitation Medicine, Rusk Institute, New York, NY; Department of Orthopedic Surgery, Langone Medical Center, New York, NY.
authors.forename: David S
authors.initials: DS
authors.lastname: Tulsky
authors.affiliation: Health and Disability Research Institute, Boston University School of Public Health, Boston, MA.
authors.forename: Alan
authors.initials: A
authors.lastname: Jette
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D003430:Cross-Sectional Studies; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010264:Paraplegia / Q000534:rehabilitation; D026741:Physical Therapy Modalities; D011594:Psychometrics; D011782:Quadriplegia / Q000534:rehabilitation; D012047:Rehabilitation Centers; D015203:Reproducibility of Results; D013119:Spinal Cord Injuries / Q000150:complications / Q000523:psychology* / Q000534:rehabilitation*
keywords: Activities of daily living; Outcome assessment (health care); Psychometrics; Rehabilitation; Spinal cord injuries