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Staging functional independence validity and applications.

Margaret G Stineman1, Richard N Ross, Roger Fiedler

  • 1Department of Rehabilitation Medicine, Leonard Davis Institute of Health Economics, Clinical Epidemiology Unit, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia, USA.

Archives of Physical Medicine and Rehabilitation
|February 18, 2003
PubMed
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The Activities of Daily Living, Sphincter-management, Mobility, and Executive-function (ASME) staging system demonstrates validity and sensitivity to change in functional independence. This system aids in prognosis, goal setting, and quality monitoring for rehabilitation patients.

Area of Science:

  • Rehabilitation Medicine
  • Functional Independence Assessment
  • Health Outcomes Research

Background:

  • The Activities of Daily Living, Sphincter-management, Mobility, and Executive-function (ASME) staging system was developed to assess functional independence.
  • Validating this system is crucial for its reliable application in clinical practice and research.

Purpose of the Study:

  • To establish the construct and predictive validity of the ASME staging system.
  • To describe potential applications of the ASME staging system in rehabilitation.

Main Methods:

  • Utilized national data from 231,686 individuals discharged from 560 US inpatient rehabilitation facilities in 1995.
  • Assessed construct validity by examining stage distribution across impairment categories.
  • Determined predictive validity by correlating admission stages with discharge outcomes (community discharge, morbidity, mortality).

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Main Results:

  • Over 90% of patients showed improvement in at least one functional domain without decline in others.
  • Higher admission stages significantly predicted higher odds of community discharge (2.1-3.1 times).
  • Higher admission stages reduced the odds of acute hospitalization or death (by a factor of 0.33-0.65).

Conclusions:

  • The ASME staging system (Functional Independence Staging - FIS) is valid and sensitive to functional changes.
  • FIS is relevant for prognostication, therapeutic modality selection, and identifying functional goals.
  • FIS can serve as an outcome indicator for quality monitoring, particularly under prospective payment systems.