Detection of anticipatory postural adjustments prior to gait initiation using inertial wearable sensors

Table 1 Inter-item correlation results for all the signals subject by subject

Subject	Acceleration			Angular velocity			CoP displacement
	ML	AP	UD	ML	AP	UD	ML	AP
1	0.88	0.87	0.83	0.69	0.56	0.64	0.99	0.99
2	0.87	0.92	0.72	0.80	0.80	0.73	0.99	0.98
3	0.82	0.93	0.65	0.83	0.60	0.77	0.97	0.95
4	0.84	0.67	0.50	0.69	0.55	0.77	0.97	0.98
5	0.83	0.83	0.75	0.88	0.81	0.94	0.98	0.99
6	0.51	0.97	0.78	0.83	0.54	0.65	0.98	0.98
7	0.87	0.84	0.83	0.84	0.74	0.77	0.93	0.99
8	0.93	0.97	0.90	0.93	0.89	0.88	0.99	0.99
9	0.80	0.92	0.83	0.93	0.83	0.68	0.98	0.86
10	0.57	0.84	0.72	0.84	0.70	0.69	0.98	0.93
average	0.79	0.88	0.75	0.83	0.70	0.75	0.98	0.97
SD	0.14	0.09	0.11	0.08	0.13	0.10	0.02	0.04

Inter-item correlation results for all signals from all the subjects (p < 0.05) in the worst case scenario. All signals were low-pass filtered at 3 Hz and evaluated over 5 s. A higher value means that the pattern of movement is very similar between trials; a lower value indicates that the movement is different between trials. Ideally, the value should be 1.

ISSN: 1743-0003