Comparing Postural Stability Entropy Analyses to Differentiate Fallers and Non-fallers

Peter C. Fino, Ahmad R. Mojdehi, Khaled Adjerid, Mohammad Habibi, Thurmon Lockhart, Shane D. Ross

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The health and financial cost of falls has spurred research to differentiate the characteristics of fallers and non-fallers. Postural stability has received much of the attention with recent studies exploring various measures of entropy. This study compared the discriminatory ability of several entropy methods at differentiating two paradigms in the center-of-pressure of elderly individuals: (1) eyes open (EO) vs. eyes closed (EC) and (2) fallers (F) vs. non-fallers (NF). Methods were compared using the area under the curve (AUC) of the receiver-operating characteristic curves developed from logistic regression models. Overall, multiscale entropy (MSE) and composite multiscale entropy (CompMSE) performed the best with AUCs of 0.71 for EO/EC and 0.77 for F/NF. When methods were combined together to maximize the AUC, the entropy classifier had an AUC of for 0.91 the F/NF comparison. These results suggest researchers and clinicians attempting to create clinical tests to identify fallers should consider a combination of every entropy method when creating a classifying test. Additionally, MSE and CompMSE classifiers using polar coordinate data outperformed rectangular coordinate data, encouraging more research into the most appropriate time series for postural stability entropy analysis.

Original languageEnglish (US)
JournalAnnals of Biomedical Engineering
DOIs
StateAccepted/In press - Oct 13 2015

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Entropy
Classifiers
Composite materials
Logistics
Time series
Health
Costs

Keywords

  • Approximate entropy
  • Composite multiscale entropy
  • Elderly
  • Entropy
  • Fallers
  • Multiscale entropy
  • RQA
  • Sample entropy

ASJC Scopus subject areas

  • Biomedical Engineering

Cite this

Comparing Postural Stability Entropy Analyses to Differentiate Fallers and Non-fallers. / Fino, Peter C.; Mojdehi, Ahmad R.; Adjerid, Khaled; Habibi, Mohammad; Lockhart, Thurmon; Ross, Shane D.

In: Annals of Biomedical Engineering, 13.10.2015.

Research output: Contribution to journalArticle

Fino, Peter C. ; Mojdehi, Ahmad R. ; Adjerid, Khaled ; Habibi, Mohammad ; Lockhart, Thurmon ; Ross, Shane D. / Comparing Postural Stability Entropy Analyses to Differentiate Fallers and Non-fallers. In: Annals of Biomedical Engineering. 2015.
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