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Reliability of center of pressure measures for assessing the development of sitting postural control in infants with or at risk of cerebral palsy.

Abstract：

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.

journal_name

Arch Phys Med Rehabil

journal_title

Archives of physical medicine and rehabilitation

authors

Kyvelidou A,Harbourne RT,Shostrom VK,Stergiou N

doi

10.1016/j.apmr.2010.06.027

subject

Has Abstract

pub_date

2010-10-01 00:00:00

pages

1593-601

issue

eissn

0003-9993

issn

1532-821X

pii

S0003-9993(10)00369-2

journal_volume

pub_type

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Reliability of center of pressure measures for assessing the development of sitting postural control in infants with or at risk of cerebral palsy.