Abstract
Objective
To link the Activity Measure for Post-Acute Care (AM-PAC) Applied Cognition to the
Patient-Reported Outcomes Measurement Information System (PROMIS) Cognitive Function,
allowing for a common metric across scales.
Design
Cross-sectional survey study.
Setting
Outpatient rehabilitation clinics.
Participants
Consecutive sample of 500 participants (N=500) aged ≥18 years presenting for outpatient
therapy (physical, occupation, speech).
Interventions
Not applicable.
Main Outcome Measures
AM-PAC Medicare and Generic Cognition short forms and PROMIS Cognitive Function items
representing the PROMIS Cognitive Function item bank.
Results
The calibration of 25 AM-PAC cognition items with 11 fixed PROMIS cognitive function item parameters using
item-response theory indicated that items were measuring the same underlying construct
(cognition). Both scales measured a wide range of functioning. The AM-PAC Generic
Cognitive assessment showed more reliability with lower levels of cognition, whereas
the PROMIS Cognitive Function full-item bank was more reliable across a larger distribution
of scores. Data were appropriate for a fixed-anchor item response theory–based crosswalk
and AM-PAC Cognition raw scores were mapped onto the PROMIS metric.
Conclusions
The crosswalk developed in this study allows for converting scores from the AM-PAC
Applied Cognition to the PROMIS Cognitive Function scale.
Keywords
List of abbreviations:
AM-PAC (Activity Measure for Post-Acute Care), GRM (graded response model), IRT (item response theory), PROMIS (Patient-Reported Outcomes Measurement Information System), REDCap (Research Electronic Data Capture)To read this article in full you will need to make a payment
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Article info
Publication history
Published online: May 25, 2021
Accepted:
April 16,
2021
Received in revised form:
March 22,
2021
Received:
December 29,
2020
Footnotes
Supported by the University of Pittsburgh Medical Center Wolff Center and the National Institutes of Health (grant no. UL1-TR-001857) for use of Research Electronic Data Capture (REDCap).
Disclosures: none.
Identification
Copyright
© 2021 The American Congress of Rehabilitation Medicine. Published by Elsevier Inc. All rights reserved.
