Table 5.

Predictor Variables of Six-Minute Walk Distance and their Unstandardized Coefficients and Standardized Coefficients (β) and Significance

Predictor Variables	Unstandardized Coefficients*	Standardized Coefficients (β)	R2	95% CI	p
Three-factor linear regression model (n=58)
Constant	207.9
ABC Score	2.7	0.434	0.768	1.6–45.0	<0.001**
FST time (s)	−9.1	−0.433		−12.1–−4.5	<0.001**
BAL time (s)	3.1	0.147		0.040–4.4	0.046***
Two-factor linear regression model (n=58)
Constant	218.5
ABC Score	3.4	0.485	0.750	1.97–4.89	<0.001**
FST time (s)	−9.1	−0.441		−12.40–−4.5
Single-factor regression models
Constant	−37.4
ABC Score (n=58) (linear)	5.9	0.815	0.664	4.7–6.7	<0.001**
Constant	501.2
FST time (s) (n=64) (linear)	−15.0	−0.804	0.661	460.6–539.6	<0.001**
Constant	602.4
FST time (s) (n=64) (curvilinear/quadratic)	β 1=−33.1	β 2=0.507	0.792		<0.001**

^*5% confidence interval bands shown in Figures 1 and 2.

^**p<0.01

^***p<0.05

CI=confidence interval; ABC=Activities-specific Balance Confidence Scale; FST=Functional Stair Test; BAL=standing static balance