. 2015 Oct 28;10:1711–1732. doi: 10.2147/CIA.S91997

Table S1.

Multiple regression for the linear global time effect (from pretest to 6-month test, N=71) and the interaction between orthogonal contrasts and time effect for gait variable “velocity”

Dependent variable	Predictor	b	95% CI		SE b	β	P two tailed	R²-change
Velocity preferred	Linear global time effect	7.10	5.19	9.01	0.97	0.23	<0.001^***	0.053
	Quadratic global time effect	−1.03	−2.13	0.08	0.56	−0.06	0.068^t	0.003
	Linear interaction AB × C	−0.26	−1.60	1.07	0.67	−0.01	0.695	0.000
	Linear interaction A × B	−1.63	−4.00	0.75	1.20	−0.04	0.178	0.002
Velocity fast	Linear global time effect	8.64	6.35	10.92	1.16	0.22	<0.001^***	0.048
	Quadratic global time effect	−0.86	−2.18	0.47	0.67	−0.04	0.203	0.001
	Linear interaction AB × C	−0.08	−1.68	1.51	0.81	0.00	0.919	0.000
	Linear interaction A × B	2.27	−0.57	5.11	1.44	0.05	0.116	0.002
Velocity preferred DT	Linear global time effect	6.79	4.60	8.99	1.11	0.18	<0.001^***	0.033
	Quadratic global time effect	−0.48	−1.74	0.79	0.64	−0.02	0.456	0.000
	Linear interaction AB × C	−0.33	−1.85	1.20	0.77	−0.01	0.674	0.000
	Linear interaction A × B	−1.00	−3.72	1.72	1.38	−0.02	0.468	0.000
Velocity fast DT	Linear global time effect	7.90	5.40	10.39	1.26	0.20	<0.001^***	0.039
	Quadratic global time effect	0.67	−0.77	2.11	0.73	0.03	0.361	0.001
	Linear interaction AB × C	−0.69	−2.43	1.05	0.88	−0.03	0.431	0.001
	Linear interaction A × B	−0.03	−3.13	3.07	1.57	0.00	0.985	0.000
Velocity preferred DTC	Linear global time effect	0.00	−0.02	0.02	0.01	0.00	0.930	0.000
	Quadratic global time effect	0.00	−0.01	0.01	0.01	0.03	0.480	0.001
	Linear interaction AB × C	0.00	−0.01	0.01	0.01	−0.01	0.858	0.000
	Linear interaction A × B	0.00	−0.02	0.03	0.01	0.02	0.717	0.000
Velocity fast DTC	Linear global time effect	0.01	−0.01	0.02	0.01	0.04	0.461	0.002
	Quadratic global time effect	0.01	0.00	0.02	0.01	0.10	0.065^t	0.011
	Linear interaction AB × C	−0.01	−0.02	0.01	0.01	−0.06	0.258	0.004
	Linear interaction A × B	−0.01	−0.04	0.01	0.01	−0.07	0.213	0.005

Notes: Bold values indicate significance or trend.

^***

P<0.001.

P<0.10 trend.

Abbreviations: A, DANCE; B, MEMORY; C, PHYS; CI, confidence interval; DANCE, virtual reality video game dancing; DT, dual-task; DTC, dual-task cost; MEMORY, treadmill walking with simultaneous verbal memory training; PHYS, treadmill walking; SE, ± standard error.