Table 1.

Presents the correlations (Rho) of maximum (MAX) and root mean square (RMS) acceleration as derived through smartphone and research-grade accelerometry.

Balance task	Accelerometry variable	Rho (ρ)	p-value
Eyes open	MAX ML	0.755	<0.01**
	MAX AP	0.982	<0.01**
	RMS ML	0.918	<0.01**
	RMS AP	1.000	<0.01**
	CEA	0.727	0.011*
Eyes closed	MAX ML	0.866	0.01**
	MAX AP	0.864	0.01**
	RMS ML	0.492	0.124
	RMS AP	0.936	<0.01**
	CEA	0.909	<0.01**
Functional reach	MAX ML	0.515	0.128
	MAX AP	0.818	<0.01**
	RMS ML	0.964	<0.01**
	RMS AP	0.945	<0.01**
	CEA	0.982	<0.01**
Functional stability boundary	MAX ML	0.218	0.519
	MAX AP	0.527	0.096
	RMS ML	0.991	<0.01**
	RMS AP	1.000	<0.01**
	CEA	0.891	<0.01**

^**A significant correlation where p ≤ 0.01 level (2-tailed).

^*p < 0.05. Red coloring indicates a small correlation coefficient, yellow indicates moderate, and green indicates large.