Document Detail

Reliability of center of pressure measures for assessing the development of sitting postural control in infants with or at risk of cerebral palsy.
MedLine Citation:
PMID:  20875520     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To establish the test-retest reliability of linear and nonlinear measures, including intra- and intersession reliability, when used to analyze the center of pressure (COP) time series during the development of infant sitting postural control in infants with or at risk for cerebral palsy (CP).
DESIGN: Longitudinal study.
SETTING: University hospital laboratory.
PARTICIPANTS: Infants with or at risk for CP (N=18; mean age ± SD at entry into the study, 13.7±3.6mo).
INTERVENTIONS: Not applicable.
MAIN OUTCOME MEASURES: Infant sitting COP data were recorded for 3 trials at each session (2 sessions for each month within 1 week) for 4 consecutive months. The linear COP parameters of the root mean square, the range of sway for both the anterior-posterior and the medial-lateral directions, and the sway path were calculated. In addition, the nonlinear parameters of approximate entropy, Lyapunov exponent (LyE), and the correlation dimension for both directions were also calculated. Intra- and intersession reliability was computed by the intraclass correlation coefficient (ICC).
RESULTS: Regarding nonlinear measures, LyE showed high intra- and intersession ICC values in comparison with all other parameters evaluated. Intrasession and intersession reliability increased overall in the last 2 months of data collection and as sitting posture improved.
CONCLUSIONS: Our results suggested that the methodology presented is a reliable way of examining the development of sitting postural control in infants with or at risk for CP, and the reliability results generally parallel values found in sitting postural behavior in typical infants. Therefore, this methodology may be helpful in examining efficacy of therapy protocols directed at advancing sitting postural control in infants with motor developmental delays.
Anastasia Kyvelidou; Regina T Harbourne; Valerie K Shostrom; Nicholas Stergiou
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Archives of physical medicine and rehabilitation     Volume:  91     ISSN:  1532-821X     ISO Abbreviation:  Arch Phys Med Rehabil     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2010-09-29     Completed Date:  2010-10-19     Revised Date:  2014-09-08    
Medline Journal Info:
Nlm Unique ID:  2985158R     Medline TA:  Arch Phys Med Rehabil     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1593-601     Citation Subset:  AIM; IM    
Copyright Information:
Copyright © 2010 American Congress of Rehabilitation Medicine. Published by Elsevier Inc. All rights reserved.
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MeSH Terms
Cerebral Palsy / diagnosis*,  rehabilitation*
Developmental Disabilities / diagnosis,  rehabilitation
Hospitals, University
Longitudinal Studies
Observer Variation
Physical Therapy Modalities*
Postural Balance*
Reproducibility of Results
Grant Support

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