Physical Aspects of Healthy Aging: Assessments of Three Measures of Balance for Studies in Middle-Aged and Older Adults

Table 5

Balance platform—test-retest reliability 𝑁=203.

Variable name	Standard, eyes open	Standard, eyes closed	Foam, eyes open	Foam, eyes closed
ML sway	0.36^‡	0.38^‡	0.29^‡	0.34^‡
	(0.08)	(0.04)	(0.28^†)	(0.32^†)
Log ML sway	0.38^‡	0.46^‡	0.32^‡	0.56^‡
AP sway	0.29^‡	0.39^‡	0.36^‡	0.36^‡
	(0.12)	(0.09)	(0.14)	(0.36^†)
Log AP sway	0.33^‡	0.46^‡	0.37^‡	0.55^‡
Length of side of square	0.29^‡	0.29^‡	0.43^‡	0.43^‡
	(0.12)	(0.12)	(0.21**)	(0.21**)
Log length of side of square	0.33^‡	0.47^‡	0.45^‡	0.61^‡
Mean X speed	0.42^‡	0.36^‡	0.62^‡	0.64
	(0.07)	(0.02)	(0.32^†)	(0.24^†)
Log mean X speed	0.46^‡	0.53^‡	0.65^‡	0.71^‡
Mean Y speed	0.70^‡	0.68^‡	0.73^‡	0.72^‡
	(0.34^†)	(0.26^†)	(0.37^†)	(0.29^†)
Log mean Y speed	0.69^‡	0.69^‡	0.72^‡	0.76^‡
Velocity moment	0.37^‡	0.46^‡	0.49^‡	0.40^‡
	(0.15*)	(0.07)	(0.34^†)	(0.31^†)
Log velocity moment	0.42^‡	0.59^‡	0.55^‡	0.70^‡
Correlation	0.15*	0.24^†	0.21**	0.04
	(0.07)	(0.002)	(−0.07)	(−0.0006)
Log correlation	0.18*	0.23^†	0.21**	0.03
Main axis	−0.10	0.16*	0.13	0.09
	(−0.07)	(0.03)	(0.01)	(−0.04)
Log main axis	0.02	0.16	0.13	0.06
Mean X value	0.48^‡	0.34^‡	0.31^‡	0.31^‡
	(0.04)	(0.02)	(0.005)	(−0.10)
Log mean X value	0.35^‡	0.26^†	0.20**	0.24^†
Mean Y value	0.28^‡	0.34^‡	0.22^†	0.25^†
	(−0.06)	(−0.05)	(0.17*)	(0.21**)
Log mean Y value	0.23**	0.21**	0.23**	0.27^‡

* 𝑃<.05; **𝑃<.01; ^†𝑃<.001; ^‡𝑃<.0001.
The values in parenthesis are the age correlation for visit 1.