Related Experiment Video
Updated: Jul 9, 2025
Quantified Assessment of Infant's Gross Motor Abilities Using a Multisensor Wearable
Published on: May 17, 2024
Agreement Between the Gross Motor Ability Estimator-2 and the Gross Motor Ability Estimator-3 in Young Children With
Samuel R Pierce1, Julie Skorup, Thubi H A Kolobe
1Department of Physical Therapy (Drs Pierce and Skorup) and Division of Rehabilitation Medicine (Dr Prosser), Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; Department of Rehabilitation Science (Dr Kolobe), The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma; Developmental Neuroscience and Neurogenetics Program (Dr Smith), The Saban Research Institute, Children's Hospital Los Angeles, Los Angeles, California; Division of Developmental-Behavioral Pediatrics (Dr Smith), Children's Hospital Los Angeles, Los Angeles, California; Department of Pediatrics (Dr Smith), Keck School of Medicine, University of Southern California, Los Angeles, California; Department of Pediatrics (Dr Prosser), University of Pennsylvania, Philadelphia, Pennsylvania.
Purpose:
The purpose of this study was to determine the agreement between Gross Motor Ability Estimator-2 (GMAE-2) and Gross Motor Ability Estimator-3 (GMAE-3) calculations of Gross Motor Function Measure-66 (GMFM-66) scores in infants and young children with cerebral palsy.
Methods:
Data from 53 children 5 to 53 months of age were analyzed. Agreement between GMFM-66 scores using the GMAE-2 and the GMAE-3 was calculated using Bland-Altman plots and interclass correlation coefficients (ICCs). Eleven participants who had at least 1 GMFM-66 score of less than 25 using either method were identified for further analysis.
Results:
The average difference between GMFM-66 scores was 0.27 for all participants and 0.63 for the subset of lower-scoring participants. Good agreement was found for GMFM-66 scores for all participants (ICC = 0.998) and for subset of lower-scoring participants (ICC = 0.879).
Conclusions:
High levels of agreement exist between the GMAE-2 and the GMAE-3, which suggests that scores are comparable using either algorithm.
