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Research Article

Short-Term Repeatability of Stabilometric Assessments

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Pages 123-128 | Received 23 Oct 2015, Accepted 31 Jan 2016, Published online: 24 Jun 2016
 

ABSTRACT

The authors evaluated the short-term (within-day, between-days) repeatability of center of pressure (COP) displacements. COP sway area and speed were obtained in the morning and afternoon of two separate days, both with open (EO) and closed (EC) eyes, in 10 healthy adults. Agreement and variability among conditions were tested by ANOVA and Bland-Altman plots. Mode (EO/EC, area: p = .032; speed: p < .004), and day (day1/day2, area: p = .006; speed: p = .02) showed significant differences. The EC condition and the second test day showed the largest values, with medium-large effect sizes. Time-of-day did not influence COP displacements. Speed had better agreement than area (Bland-Altman plots). COP displacements were well reproducible within-day, but had significant between-days variations. COP assessments should be performed in the same session.

ACKNOWLEDGMENTS

The valuable work of Dr. Lorenzo Nuzzi for statistical analysis and Bland-Altman graphs interpretation is gratefully acknowledged.

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