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Related Experiment Videos

Activity outcome measurement for postacute care.

Stephen M Haley1, Wendy J Coster, Patricia L Andres

  • 1Research and Training Center on Measuring Rehabilitation Outcomes, Center for Rehabilitation Effectiveness, Sargent College of Health and Rehabilitation Sciences, Boston University, Boston, Massachusetts 02215, USA. smhaley@bu.edu

Medical Care
|January 7, 2004
PubMed
Summary

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A new 41-item Activity Measure for Postacute Care (AM-PAC) demonstrates a reliable 3-factor structure. This validated model supports outcome measurement and computer-adaptive testing in postacute care settings.

Area of Science:

  • Rehabilitation Medicine
  • Health Outcomes Research
  • Psychometrics

Background:

  • Evaluating postacute care effectiveness requires robust outcome measures.
  • Current outcome instruments lack a common structure for item banking and adaptive testing.

Purpose of the Study:

  • Investigate the factor structure, reliability, and scale properties of the International Classification of Functioning, Disability and Health (ICF) Activity domains.
  • Develop a valid outcome measurement tool for postacute care.

Main Methods:

  • Developed a 41-item Activity Measure for Postacute Care (AM-PAC).
  • Evaluated reliability and validity in 477 rehabilitation patients using factor analysis, Rasch modeling, and other psychometric techniques.

Main Results:

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  • Exploratory and confirmatory factor analyses revealed 3 distinct factors: Applied Cognition, Personal Care & Instrumental Activities, and Physical & Movement Activities, explaining 72% of variance.
  • High internal consistency reliability (Cronbach's alpha = 0.90-0.95) and supported unidimensionality across domains.

Conclusions:

  • The 3-factor AM-PAC model provides a foundation for common-item equating.
  • Enables development of computer-adaptive testing applications for comprehensive postacute care outcome measurement.