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A new paradigm for assessing postural stability.

Talah Wafa1, Christopher Zalewski2, Chizuko Tamaki3

  • 1Audiology Unit, NIDCD, NIH, Bethesda, MD, USA; Department of Hearing, Speech, and Language Sciences, Gallaudet University, Washington, DC, USA.

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|December 26, 2022
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Summary

Personalized limits of stability (pLOS) are lower than theoretical limits (tLOS) in healthy adults. Using pLOS in the Sensory Organization Test (SOT) provides a more accurate assessment of postural stability and fall risk.

Keywords:
AssessmentBalanceLOSPostural stabilitySOT

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Area of Science:

  • Biomechanics
  • Gerontology
  • Neuroscience

Background:

  • The Sensory Organization Test (SOT) assesses postural stability and fall risk using equilibrium scores.
  • These scores are calculated using theoretical limits of stability (tLOS), which may not accurately reflect individual capabilities.
  • Overestimation of stability and underestimation of fall risk can occur when using a one-size-fits-all tLOS.

Purpose of the Study:

  • To determine if limits of stability (LOS) measured in healthy adults differ from tLOS.
  • To compare SOT equilibrium scores calculated with personalized LOS (pLOS) versus tLOS.

Main Methods:

  • Sixty healthy adults across three age groups (young, middle-aged, elderly) participated.
  • Measures included SOT, LOS, Activities Balance Confidence (ABC) scale, and timed-up-and-go (TUG) test.
  • Standard SOT (tSOT) and personalized SOT (pSOT) scores were calculated using tLOS and pLOS, respectively.

Main Results:

  • Mean pLOS in healthy adults was significantly lower than tLOS.
  • Personalized SOT (pSOT) equilibrium scores were significantly lower than standard SOT (tSOT) scores.
  • This indicates that tLOS overestimates postural stability in healthy individuals.

Conclusions:

  • Individual LOS measurements are lower than theoretical estimates in healthy adults.
  • Using tLOS in SOT calculations can overestimate postural stability.
  • This has implications for accurately determining fall risk.