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Clinical utility of a patient-reported outcome for assessing spasticity in a pediatric population

Elaine Hong Hatch1, Ashlee M Jaffe2,3, Laura A Prosser2,3

  • 1Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.

Journal of Pediatric Rehabilitation Medicine
|March 28, 2025
PubMed

Insights

The Zorowitz scale shows promise in tracking changes in pediatric spasticity after treatment. However, its construct validity compared to existing clinical measures needs further investigation in children.

Area of Science:

  • Pediatric Rehabilitation Medicine
  • Clinical Outcomes Assessment
  • Neurology

Background:

  • Spasticity significantly impacts children's function and quality of life.
  • Patient-reported outcome (PRO) measures are crucial for evaluating treatment effectiveness.
  • The Zorowitz spasticity scale is a PRO designed to assess the impact of spasticity.

Purpose of the Study:

  • To evaluate the construct validity of the Zorowitz spasticity scale in pediatric populations.
  • To assess the responsiveness of the Zorowitz scale to treatment interventions for pediatric spasticity.
  • To determine the clinical utility of the Zorowitz scale in guiding treatment decisions for childhood spasticity.

Main Methods:

  • Retrospective analysis of data from 505 pediatric patients receiving spasticity injections.
  • Collected data included Zorowitz scores, Modified Ashworth Scale (MAS) for spasticity, and Gross Motor Function Classification System (GMFCS) levels.
  • Statistical analyses examined relationships between baseline scores, changes in scores, and clinical measures.

Main Results:

  • The Zorowitz scale demonstrated responsiveness to spasticity treatment, with patients reporting reduced impact post-injection (p < 0.0001).
  • Higher baseline Zorowitz scores correlated with greater post-injection score reduction (r = -0.39, p < 0.00001).
  • No significant relationship was found between baseline Zorowitz scores and functional level (GMFCS) or muscle tone (MAS).

Conclusions:

  • The Zorowitz scale may be a responsive tool for monitoring pediatric spasticity treatment.
  • The study did not establish construct validity against existing clinical measures, suggesting potential limitations or unique construct measurement.
  • Further research is needed to clarify the clinical validity and application of the Zorowitz scale in pediatric spasticity management.

Keywords:
musclepatient-reported outcomepediatricrehabilitationspasticity

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