Abstract
Objective
Validation of linking coefficients to transform Pediatric Spinal Cord Injury Activity
Measure (PEDI-SCI/AM) scores to adult Spinal Cord Injury-Functional Index (SCI-FI)
scores.
Design
This cross-sectional study administered PEDI-SCI/AM and SCI-FI computerized adaptive
tests (CATs) and short forms (SFs) to children with SCI and parents or caregivers.
Setting
Hospitals, university, and rehabilitation institute.
Participants
About 107 children with SCI and 96 parent or caregivers.
Interventions
Not applicable.
Main Outcome Measures
Linking coefficients estimated SCI-FI (est-SCI-FI) scores from PEDI-SCI/AM scores
for matched domains. Correlations between est-SCI-FI and actual SCI-FI scores were
calculated. If correlations exceeded the criterion linking (0.866), the following
analyses to compare est-SCI-FI and actual SCI-FI scores were conducted: paired t tests, intraclass correlation coefficients (ICCs 3, 1), percent of cases with absolute
score differences at different thresholds.
Results
Two matched domains, PEDI-SCI/AM Daily Routine/SCI-FI Self-Care and PEDI-SCI/AM General
Mobility/SCI-FI Basic Mobility, met the linking criterion for both respondent-types
(parent and child) and administration modes (CAT and SF). PEDI-SCI/AM Daily Routine
and SCI-FI Fine Motor Function did not meet linking criterion for respondent type
or mode. The linking criterion was met for wheelchair domains (child SF and CAT) and
ambulation domains (child SF only). Significant differences between est-SCI-FI and
actual SCI-FI scores were noted for all matched domains except Daily Routine/Self-Care
(child SF only; parent SF and CAT). ICC values showed excellent agreement (range=0.75-0.89).
Absolute differences between est-SCI-FI and actual SCI-FI scores were less than 1
standard deviation (except wheelchair CAT child).
Conclusions
Linking coefficients applied to PEDI-SCI/AM scores can provide valid SCI-FI estimates
that vary by domain, mode, and respondent type.
Keywords
List of abbreviations:
CAT (computerized adaptive test), est-SCI-FI (estimated Spinal Cord Injury-Functional Index), ICC (intraclass correlation coefficient), MWC (manual wheelchair), PEDI-SCI/AM (Pediatric Spinal Cord Injury Activity Measure), PROM (patient-reported outcome measure), PWC (power wheelchair), SCI (spinal cord injury), SCI-FI (Spinal Cord Injury-Functional Index), SF (short form)To read this article in full you will need to make a payment
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Article info
Publication history
Published online: May 30, 2019
Footnotes
Supported by Shriners Hospitals for Children Project #79142, Medical Rehabilitation Infrastructure Network (grant no. #5R24HD065688-05).
Disclosures: M.J.Mulcahey received compensation for her role as associate editor of Topics in Spinal Cord Injury Rehabilitation and royalties for the textbook Spinal Cord Injury in Children and Young Adults. She received grant funding from Shriners Hospitals for Children, Craig H. Neilsen Foundation, Rick Hansen Institute, and National Institute of Neurologic Disorders and Stroke. Lawrence C.Vogel received compensation for his role as editor of Topics in Spinal Cord Injury Rehabilitation and royalties for the textbook Spinal Cord Injury in Children and Young Adults. He received grant funding from Shriners Hospitals for Children and Craig H. Neilsen Foundation. The other authors have nothing to disclose.
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© 2019 by the American Congress of Rehabilitation Medicine
