Table 7.

Hierarchical multiple regression predicting DST scores (n = 58).

	b	SE	β	R2	Adjusted R2	ΔR2	F	ΔF
Model 1				0.05	0.03	0.05	2.89	2.89
Constant	54.43	1.17
UFOV	−0.01	0.01	−0.22
Model 2				0.16	0.13	0.11	5.24*	7.28*
Constant	49.75	2.71
UFOV	−0.01	0.01	−0.16
DSB	1.24	0.46	0.34*
Model 3				0.18	0.13	0.02	3.89*	1.16
Constant	48.97	2.81
UFOV	−0.01	0.01	−0.15
DSB	1.30	0.46	0.35*
Tai Chi exercise dose	1.30	1.17	0.13
Model 4				0.19	0.13	0.01	3.05*	0.61
Constant	48.21	2.98
UFOV	−0.01	0.01	−0.13
DSB	1.30	0.46	0.35*
Tai Chi exercise dose	1.10	1.20	0.12
RAPA category	0.96	1.22	0.10

Abbreviations: DSB = digit span backward; DST = Driving Scenes Test; RAPA = Rapid Assessment of Physical Activity; UFOV = Useful Field of View Test.

^*p < 0.01.