Functional strength measurement in cerebral palsy: feasibility, test-retest reliability, and construct validity

Wendy Aertssen*, Ellen Smulders, Bouwien Smits-Engelsman, Eugene Rameckers

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Purpose: No instrument exists that measures functional strength in both lower and upper extremities in children with cerebral palsy (CP). Therefore, the functional strength measurement (FSM) was tested for feasibility, test-retest reliability and validity in CP. Methods: Thirty-seven children with CP (aged 4-10 years, Gross Motor Function Classification System I and II) participated. The most common compensations for CP were described; new item descriptions were standardized, and one item was removed. Test-retest reliability was examined. To measure convergent validity, correlations between the FSM-CP and isometric muscle strength measured with the handheld dynamometer (HHD) were determined. Results: Test-retest reliability was considered high for all items (intra-class correlation coefficient 0.79-0.95). Significant correlations between the HHD and FSM-CP ranged from r = 0.36 to 0.75. Conclusion: The FSM-CP is feasible, reliable, and valid to use in children with CP. The FSM-CP can be considered as a helpful tool in clinical practice of physical examination of children with CP.

Original languageEnglish
Pages (from-to)453-461
Number of pages9
JournalDevelopmental Neurorehabilitation
Volume22
Issue number7
DOIs
Publication statusPublished - 3 Oct 2019

Keywords

  • Cerebral palsy
  • children
  • feasibility
  • functional strength measurement
  • reliability
  • validity
  • HAND-HELD DYNAMOMETRY
  • YOUNG-CHILDREN
  • MUSCLE STRENGTH
  • MANUAL ABILITY
  • IMPAIRMENTS
  • SPASTICITY
  • YOUTH
  • CLASSIFICATION
  • EXTREMITY
  • BALANCE

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