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Reliability of center of pressure measures for assessing the development of sitting postural control

Anastasia Kyvelidou1, Regina T Harbourne, Wayne A Stuberg

  • 1Department of Health Physical Education and Recreation, University of Nebraska at Omaha, Omaha, NE 68182-0216, USA.

Archives of Physical Medicine and Rehabilitation
|July 7, 2009
PubMed

Insights

Nonlinear analysis tools, like approximate entropy, reliably measure infant sitting postural control development. Reliability improves as infants mature and their sitting posture develops.

Area of Science:

  • Pediatric physical therapy
  • Motor control research
  • Infant development studies

Background:

  • Assessing infant sitting postural control is crucial for early motor development.
  • Reliable measurement tools are needed to track developmental progress and intervention effectiveness.

Purpose of the Study:

  • To evaluate the reliability of linear and nonlinear analysis tools for center of pressure (COP) time series data.
  • To determine intrasession and intersession reliability in analyzing infant sitting postural control.

Main Methods:

  • A longitudinal study involving 33 typically developing infants.
  • COP data collected twice weekly over 4 months, with 3 trials per session.
  • Linear (e.g., RMS, range) and nonlinear (e.g., approximate entropy) parameters calculated.
  • Intraclass correlation coefficient (ICC) used to quantify reliability.

Main Results:

  • The nonlinear parameter, approximate entropy, demonstrated high intrasession and intersession reliability.
  • Reliability generally increased with infant maturation and improved sitting posture.
  • Approximate entropy showed superior reliability compared to other evaluated parameters.

Conclusions:

  • Center of pressure (COP) data analysis is a reliable method for studying the development of infant sitting postural control.
  • Establishing reliability of COP analysis is essential before using it to assess interventions for infants with motor delays.
Abstract

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