Table 2.

Test-retest reliability of APAs and first step characteristics measured with inertial sensors in healthy subjects and subjects with PD tested ON medication (PD ON) in Experiment II.

	CTR							PD ON
	Test I		Test II		ICC(1-1)	95 CI interval		Test I		Test II		ICC(1-1)	95 CI interval
	Mean	SEM	Mean	SEM		lower	upper	Mean	SEM	Mean	SEM		lower	upper
APA duration (s)	0.371	0.019	0.386	0.019	0.56	0.12	0.82	0.34	0.03	0.35	0.04	0.63	0.17	0.87
Peak ML (g)	0.052	0.003	0.05	0.003	0.81	0.55	0.93	0.04	0.01	0.04	0.01	0.82	0.51	0.94
Peak AP (g)	0.053	0.004	0.058	0.005	0.52	0.06	0.8	0.03	0.01	0.04	0.01	0.63	0.17	0.87
1st Step ROM (degrees)	39.911	2.072	41.524	1.708	0.78	0.5	0.92	30.44	3.61	28.51	3.92	0.68	0.25	0.89
1st Step duration (s)	0.351	0.052	0.398	0.043	0.79	0.51	0.91	0.58	0.13	0.55	0.08	0.42	−0.13	0.77