Table 4.

Mobility improvement scores (in logits) for each crossover period, and across both periods

	Real Mean (SD)	Sham Mean (SD)	Difference Mean (SD)	T-test (2 tailed)
Period 1 a	1.9b (3.3) n = 33	1.2b (2.2) n = 28	0.7 (2.9) 95% CI −0.8 to 2.1	t(59) = 0.88, p = 0.38
Period 2 a	2.0b (3.4) n = 28	1.4b (2.8) n = 33	0.6 (3.1) 95% CI −2.1 to 1.1	t(59) = 0.69, p = 0.50
Periods 1 and 2 c (all subjects)	1.9 (3.3) n = 61	1.3 (2.5) n = 61	0.6 (2.6) 95% CI −0.1 to 1.3	t(60) = 1.73, p = 0.09
Periods 1 and 2 c (continued wear)	3.0 (3.2) n = 25	1.1 (2.4) n = 25	1.9 (2.7) 95% CI 0.7 to 3.0	t(24) = 3.45, p = 0.002
Periods 1 and 2 c (discontinued wear)	(3.3) n = 35	1.6 (2.7) n = 35	−0.5 (2.1) 95% CI −1.2 to 0.3	t(34) = 1.29, p = 0.21

^aAnalyzed as if for a parallel arm trial (independent samples t-test)

^bMobility improvement scores all significantly different from 0.0 (one-sample t-tests, all p < 0.01)

^cMatched pairs analysis for the crossover (paired t-test)