Relationships between impairment and physical disability as measured by the functional independence measure

Allen W. Heinemann*, John Michael Linacre, Benjamin D. Wright, Byron B. Hamilton, Carl Granger

*Corresponding author for this work

Research output: Contribution to journalArticle

383 Scopus citations

Abstract

This study was conducted to scale the Functional Independence Measure (FIM) with Rasch Analysis and to determine the similarity of scaled measures across impairment groups. The results show that the FIM contains two fundamental subsets of items: one measures motor and the second measures cognitive function. Rasch analysis of the Uniform Data System for Medical Rehabilitation patient sample yielded interval measures of motor and cognitive functions. The validity of the FIM was supported by the patterns of item difficulties across impairment groups. Adequate clinical precision of the FIM was demonstrated, though suggestions for improvement emerged. The frequency of misfit between patients and the performance scales varied across impairment groups, but was acceptable. The results of this project will enable clinicians and researchers to plan cost-effective treatment by providing a valid measure of disability.

Original languageEnglish (US)
Pages (from-to)566-573
Number of pages8
JournalArchives of physical medicine and rehabilitation
Volume74
Issue number6
DOIs
StatePublished - Jun 1993

Keywords

  • Disability evaluation
  • Measurement
  • Rehabilitation

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation
  • Rehabilitation

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