Table 3.

Linear mixed effect model of mean COP velocity^a with the following predictors: (1) group; (2) time; (3) Group × time^b.

	Parameter	Estimate	Std. error	df	t	Sig.	95% confidence interval
							Lower bound	Upper bound
1)	Control vs. MPS	0.04	0.08	1875.69	0.53	0.60	−0.12	0.20
	Control vs. PS	0.46	0.14	1854.75	3.41	<0.01	0.20	0.73
2)	Time: 0.5 vs. 1.0	0.04	0.08	1938.67	0.56	0.58	−0.11	0.20
	Time: 0.5 vs. 1.5	0.02	0.08	1951.40	0.26	0.80	−0.13	0.17
	Time: 0.5 vs. 2.0	−0.02	0.08	1970.08	−0.23	0.82	−0.17	0.14
	Time: 0.5 vs. 2.5	0.04	0.08	1997.40	0.50	0.61	−0.11	0.19
	Time: 0.5 vs. 3.0	0.02	0.08	2037.25	0.32	0.75	−0.13	0.18
	Time: 0.5 vs. 3.5	−0.03	0.08	2095.29	−0.35	0.73	−0.18	0.13
	Time: 0.5 vs. 4.0	−0.05	0.08	2179.71	−0.63	0.53	−0.20	0.10
	Time: 0.5 vs. 4.5	−0.08	0.08	2302.49	−1.10	0.27	−0.24	0.07
	Time: 0.5 vs. 5.0	0.01	0.08	2480.94	0.12	0.90	−0.14	0.16
	Time: 0.5 vs. 5.5	0.04	0.08	2738.86	0.50	0.62	−0.11	0.19
	Time: 0.5 vs. 6.0	−0.10	0.07	3103.44	−1.37	0.17	−0.25	0.04
	Time: 0.5 vs. 6.5	−0.08	0.07	3581.95	−1.08	0.28	−0.22	0.06
	Time: 0.5 vs. 7.0	−0.10	0.07	4075.94	−1.49	0.14	−0.23	0.03
	Time: 0.5 vs. 7.5	−0.05	0.06	4231.16	−0.76	0.45	−0.16	0.07
	Time: 0.5 vs. 8.0	−0.08	0.05	3630.88	−1.61	0.11	−0.17	0.02
3)	[Time: 0.5 vs. 1.0]*[Control vs. MPS]	−0.03	0.11	1938.67	−0.27	0.78	−0.25	0.19
	[Time: 0.5 vs. 1.5]*[Control vs. MPS]	0.02	0.11	1951.40	0.15	0.88	−0.20	0.24
	[Time: 0.5 vs. 2.0]*[Control vs. MPS]	0.09	0.11	1970.08	0.79	0.43	−0.13	0.31
	[Time: 0.5 vs. 2.5]*[Control vs. MPS]	0.01	0.11	1997.40	0.11	0.91	−0.21	0.23
	[Time: 0.5 vs. 3.0]*[Control vs. MPS]	0.08	0.11	2037.25	0.70	0.48	−0.14	0.30
	[Time: 0.5 vs. 3.5]*[Control vs. MPS]	0.12	0.11	2095.29	1.03	0.30	−0.10	0.34
	[Time: 0.5 vs. 4.0]*[Control vs. MPS]	0.13	0.11	2179.71	1.20	0.23	−0.08	0.35
	[Time: 0.5 vs. 4.5]*[Control vs. MPS]	0.10	0.11	2302.49	0.94	0.35	−0.11	0.32
	[Time: 0.5 vs. 5.0]*[Control vs. MPS]	0.05	0.11	2480.94	0.41	0.68	−0.17	0.26
	[Time: 0.5 vs. 5.5]*[Control vs. MPS]	−0.06	0.11	2738.86	−0.56	0.57	−0.28	0.15
	[Time: 0.5 vs. 6.0]*[Control vs. MPS]	0.11	0.11	3103.44	1.04	0.30	−0.10	0.32
	[Time: 0.5 vs. 6.5]*[Control vs. MPS]	0.09	0.10	3581.95	0.90	0.37	−0.11	0.30
	[Time: 0.5 vs. 7.0]*[Control vs. MPS]	0.06	0.10	4075.94	0.61	0.54	−0.13	0.25
	[Time: 0.5 vs. 7.5]*[Control vs. MPS]	0.02	0.09	4231.16	0.27	0.79	−0.15	0.19
	[Time: 0.5 vs. 8.0]*[Control vs. MPS]	0.07	0.07	3630.88	0.98	0.33	−0.07	0.20
	[Time: 0.5 vs. 1.0]*[Control vs. PS]	−0.19	0.19	1938.67	−0.99	0.32	−0.56	0.18
	[Time: 0.5 vs. 1.5]*[Control vs. PS]	−0.20	0.19	1951.40	−1.06	0.29	−0.57	0.17
	[Time: 0.5 vs. 2.0]*[Control vs. PS]	−0.17	0.19	1970.08	−0.90	0.37	−0.54	0.20
	[Time: 0.5 vs. 2.5]*[Control vs. PS]	−0.15	0.19	1997.40	−0.82	0.41	−0.52	0.22
	[Time: 0.5 vs. 3.0]*[Control vs. PS]	−0.09	0.19	2037.25	−0.49	0.63	−0.46	0.28
	[Time: 0.5 vs. 3.5]*[Control vs. PS]	−0.10	0.19	2095.29	−0.53	0.60	−0.47	0.27
	[Time: 0.5 vs. 4.0]*[Control vs. PS]	−0.23	0.19	2179.71	−1.21	0.23	−0.59	0.14
	[Time: 0.5 vs. 4.5]*[Control vs. PS]	−0.19	0.19	2302.49	−1.03	0.30	−0.56	0.17
	[Time: 0.5 vs. 5.0]*[Control vs. PS]	−0.25	0.19	2480.94	−1.35	0.18	−0.61	0.11
	[Time: 0.5 vs. 5.5]*[Control vs. PS]	−0.40	0.18	2738.86	−2.20	0.03	−0.76	−0.04
	[Time: 0.5 vs. 6.0]*[Control vs. PS]	−0.11	0.18	3103.44	−0.60	0.55	−0.46	0.24
	[Time: 0.5 vs. 6.5]*[Control vs. PS]	−0.13	0.17	3581.95	−0.74	0.46	−0.47	0.21
	[Time: 0.5 vs. 7.0]*[Control vs. PS]	−0.03	0.16	4075.94	−0.17	0.86	−0.35	0.29
	[Time: 0.5 vs. 7.5]*[Control vs. PS]	−0.16	0.15	4231.16	−1.09	0.28	−0.45	0.13
	[Time: 0.5 vs. 8.0]*[Control vs. PS]	−0.15	0.11	3630.88	−1.28	0.20	−0.37	0.08

^aNatural log (COP velocity).

^bAdjusted for age, gender, and ethnicity.