Document Detail

Comparison of an in-shoe pressure measurement device to a force plate: concurrent validity of center of pressure measurements.
MedLine Citation:
PMID:  10998609     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to assess the concurrent validity of center of pressure (COP) measurements during walking, comparing the Parotec System (an in-shoe pressure measurement device) to an Advanced Mechanical Technology Inc. (AMTI) force plate. Pearson correlation coefficients comparing COP displacement in the medial-lateral (ML) and anterior-posterior (AP) direction calculated from the two systems were greater than 0.70 for 52/67 trials (78%) in the ML direction and were greater than 0.90 for 67/67 trials (100%) in the AP direction. The mean root mean square (RMS) error for COP displacement in the ML direction was 0.56+/-0.3 cm and in the AP direction was 1.37+/-0.59 cm. Overall, the Parotec System showed good correlation and small RMS errors when compared to the AMTI force plate. Additional analysis to investigate sources of error pointed to the methods used for calculating the position and orientation of the subject's foot on the force plate. Subsequent analysis to eliminate some of these errors, compared force calculated from the Parotec System and the AMTI plate and showed good to excellent correlation (>0.70) for 62/67 trials (93%). Additional data were collected that allowed for elimination of methodological errors. Again force calculated from the two systems was compared using Pearsons. These data showed excellent correlation (>0.90) for 20/20 trials (100%). This study provides evidence of the validity of the Parotec System for measuring COP during ambulation.
K J Chesnin; L Selby-Silverstein; M P Besser
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Publication Detail:
Type:  Comparative Study; Journal Article; Validation Studies    
Journal Detail:
Title:  Gait & posture     Volume:  12     ISSN:  0966-6362     ISO Abbreviation:  Gait Posture     Publication Date:  2000 Oct 
Date Detail:
Created Date:  2000-11-03     Completed Date:  2000-11-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9416830     Medline TA:  Gait Posture     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  128-33     Citation Subset:  IM    
Human Performance Laboratory, Department of Physical Therapy, Thomas Jefferson University, 130 S. 9th St., Suite 830, Philadelphia, PA 19107-5233, USA.
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MeSH Terms
Foot / physiology*
Walking / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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