Comparison of Approximate Entropy Measure and Poincaré Plot Indexes for the Study of Gait Characteristics in the Elderly

Ahsan H. Khandoker, Marimuthu Palaniswami, Rezaul K. Begg

Abstract

Early identification of at-risk gait helps prevent falls and injuries. The aim of this study is to investigate the relationship between approximate entropy (ApEn) and Poincaré plot indexes of elderly gait patterns and to test whether ApEn could be used as a reliable gait identifier for falls-risk. Minimum foot clearance (MFC) data of 14 elderly and 10 elderly participants with a history of falls and balance problems were analyzed. The ApEn values of MFC were significantly correlated with Poincaré plot indexes of MFC in the healthy elderly group, whereas correlations were absent in the elderly fallers group. Mean ApEn in the fallers group (0.18±0.03) was significantly higher than that in the healthy group (0.13±0.13). The higher ApEn values in the fallers group might indicate increased irregularities in their gait patterns and a loss of gait control mechanism. Results are useful for the early diagnosis of common gait pathologies.

References

  1. Pincus SM, Goldberger AL, : Physiological time-series analysis: what does regularity quantify? Am J Physiol, (1994) 266:H1643-H1656.
  2. Pincus S: Approximate entropy (ApEn) as a complexity measure. Chaos , (1995) 5:110- 117.
  3. Brennan, M., Palaniswami, M. and Kamen, P.W.: Do existing measures of Poincaré plot geometry reflect nonlinear features of heart rate variability? IEEE Trans. Biomed. Eng., (2001) vol. 48, pp. 1342-1347.
  4. R. J. Best, R. K. Begg, and L. Dell'Oro: The probability of tripping during gait. Int. Soc. Biomech. Conf., (1999) Calgary, AB, Canada.
  5. Richman JS, Moorman JR: Physiological time series analysis using approximate entropy and sample entropy. Am J Physiol Heart Circ Physiol, (2000) 278: H2039-H2049.
  6. Begg R.K, Palaniswami M., and Owen B.: “Support vector machine for automated gait classification. IEEE Trans. Biomed. Eng., (2005) vol. 52, No. 5 pp. 828-837.
  7. Costa M, Peng C-K, Goldberger AL, Hausdorff JM.: Multiscale entropy analysis of human gait dynamics. Physica A (2003);330:53-60.
  8. Winter, D. : The Biomechanics and Motor Control of Human Gait: Wormal, Elderly and Pathological.Waterloo: University of Waterloo Press (1991).
  9. Begg RK, Best RJ, Taylor S & Dell'Oro L:Minimum foot clearance during walking: Strategies for the minimization of trip-related falls. In Press (2006) Gait and Posture.
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Paper Citation


in Harvard Style

H. Khandoker A., Palaniswami M. and K. Begg R. (2006). Comparison of Approximate Entropy Measure and Poincaré Plot Indexes for the Study of Gait Characteristics in the Elderly . In Proceedings of the 2nd International Workshop on Biosignal Processing and Classification - Volume 1: BPC, (ICINCO 2006) ISBN 978-972-8865-67-2, pages 144-151. DOI: 10.5220/0001225701440151


in Bibtex Style

@conference{bpc06,
author={Ahsan H. Khandoker and Marimuthu Palaniswami and Rezaul K. Begg},
title={Comparison of Approximate Entropy Measure and Poincaré Plot Indexes for the Study of Gait Characteristics in the Elderly},
booktitle={Proceedings of the 2nd International Workshop on Biosignal Processing and Classification - Volume 1: BPC, (ICINCO 2006)},
year={2006},
pages={144-151},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001225701440151},
isbn={978-972-8865-67-2},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 2nd International Workshop on Biosignal Processing and Classification - Volume 1: BPC, (ICINCO 2006)
TI - Comparison of Approximate Entropy Measure and Poincaré Plot Indexes for the Study of Gait Characteristics in the Elderly
SN - 978-972-8865-67-2
AU - H. Khandoker A.
AU - Palaniswami M.
AU - K. Begg R.
PY - 2006
SP - 144
EP - 151
DO - 10.5220/0001225701440151