Table 1.

Gait initiation characteristics measured in the gait analysis laboratory with the two systems: comparison between healthy subjects (CTR) and subjects with Parkinson’s disease tested OFF medication (PD OFF). Values are mean (STD). T-tests p-values are reported.

	MEASURES	CTR		PD OFF
		Mean	STD	Mean	STD	p-value
COP and KIN	APA duration (s)	0.45	0.08	0.49	0.12	0.3
	Peak ML (mm)	43.8	11.3	26.6	10.8	0.002
	Peak AP (mm)	47.5	14.7	32.0	16.1	0.03
	1st Step Length (m)	0.56	0.13	0.50	0.08	0.2
	1st Step Velocity (m/s)	0.90	0.23	0.78	0.16	0.2
ACC & GYRO	APA duration (s)	0.44	0.13	0.46	0.18	0.8
	Peak ML (g)	0.049	0.014	0.028	0.015	0.002
	Peak AP (g)	0.044	0.031	0.015	0.015	0.01
	1st Step ROM (degree)	38.7	5.4	36.4	4.6	0.3
	1st Step duration (s)	0.40	0.18	0.53	0.23	0.1