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Anne Thackeray1, Robin L Marcus1, Lan Yu2

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Summary
This summary is machine-generated.

This study created a way to convert Activity Measure for Post-Acute Care (AM-PAC) Applied Cognition scores to Patient-Reported Outcomes Measurement Information System (PROMIS) Cognitive Function scores, enabling a unified cognitive assessment metric.

Keywords:
CognitionPatient-reported outcome measuresQuality of lifeRehabilitation

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Area of Science:

  • Rehabilitation Science
  • Psychometrics
  • Health Outcomes Measurement

Background:

  • Cognitive function assessment is crucial in rehabilitation.
  • Existing cognitive scales, such as the Activity Measure for Post-Acute Care (AM-PAC) Applied Cognition and the Patient-Reported Outcomes Measurement Information System (PROMIS) Cognitive Function, measure similar constructs but use different metrics.
  • A common metric is needed to facilitate score comparison and data integration across these scales.

Purpose of the Study:

  • To link the AM-PAC Applied Cognition scale to the PROMIS Cognitive Function scale.
  • To establish a common metric for cognitive function assessment across different scales.
  • To enable the conversion of AM-PAC Applied Cognition scores to the PROMIS Cognitive Function metric.

Main Methods:

  • A cross-sectional survey design was employed.
  • 500 adult participants undergoing outpatient therapy were recruited.
  • Item-response theory was used to calibrate AM-PAC cognition items with PROMIS cognitive function item parameters.

Main Results:

  • Item-response theory calibration confirmed that AM-PAC and PROMIS items measure the same cognitive construct.
  • Both scales captured a broad range of cognitive functioning.
  • The AM-PAC Generic Cognitive assessment demonstrated higher reliability at lower cognitive function levels, while the PROMIS Cognitive Function bank was more reliable across a wider score distribution.
  • A fixed-anchor item response theory-based crosswalk was successfully developed.

Conclusions:

  • A validated crosswalk allows for the conversion of AM-PAC Applied Cognition scores to the PROMIS Cognitive Function scale.
  • This facilitates a unified approach to measuring cognitive function in outpatient rehabilitation settings.
  • The developed crosswalk enhances the comparability of cognitive assessment data across different measurement systems.