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The purpose of this study was to assess the test-retest reliability of balance measurements in adolescents using balance measurement system(Good Balance). The subjects consisted of 31 female and 30 male adolescents from university students. This study used a repeated-measure design. Each subject com...

The purpose of this study was to assess the test-retest reliability of balance measurements in adolescents using balance measurement system(Good Balance). The subjects consisted of 31 female and 30 male adolescents from university students. This study used a repeated-measure design. Each subject completed all the different tests once and they were then repeated with 2 minutes in between. Repeated two-ways analysis of variance(ANOVA), representing two test times and both sexes, was calculated for each of the two dependent variables. Intraclass correlation coefficients(ICCs) were used to assess the test-retest reliability. The results of analysis are as followings. 1) There was not significant difference between test and retest for mediolateral sway speed and an terioposterior sway speed under conditions of normal standing with eyes open, normal standing with eyes closed and tandem standing with eyes open. There was not significant difference between males and females for mediolateral sway speed and anterioposterior sway speed under conditions of normal standing with eyes open and tandem standing with eyes open. There was significant difference between males and females for mediolateral sway speed, but not significant difference between males and females for anterioposterior sway speed under condition of normal standing with eyes closed. There were not the interaction effects between genders and test time under three conditions. 2) The reproducibility between test and retest was fair to good for anterioposterior sway speed(ICC=.60) under condition of normal standing with eyes open, for mediolateral sway speed(ICC=.61) and anterioposterior sway speed(ICC=.71) under condition of normal standing with eyes closed, and for mediolateral sway speed(ICC=.47) and anterioposterior sway speed(ICC=.50) under condition of tandem standing with eyes open. The reproducibility between test and retest was not significant for mediolateral sway speed(ICC=.38) under condition of normal standing with eyes open. Balance tests in adolescents using balance measurement system demonstrated acceptable levels of reliability.

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