Reliability of inertial sensors in the assessment of patients with vestibular disorders: a feasibility study

Table 2 Test-retest reliability, mean, Standard Deviation (SD), of parameters with excellent reliability (ICC (2,1) ≥0.8) from iSway

Parameters	Mean ± SD	Test1	Test2	B/W
Parameters		ICC (1,1)	ICC (1,1)	ICC (2,1)
Time Domain Parameters
RMS sway (ms-2)	0.196 ± 0.17	0.84	0.88	0.83
Mean distance (mm)	0.154 ± 0.13	0.84	0.9	0.83
Mean distance ML (mm)	0.07 ± 0.08	0.85	0.91	0.86
Path length AP (mm)	12.17 ± 12.86	0.89	0.90	0.87
Total sway area (m2/s5)	0.08 ± 0.19	0.78	0.88	0.80
RMS sway ML (ms-2)	0.10 ± 0.13	0.86	0.87	0.86
Path length (mm)	19.86 ± 28.36	0.89	0.93	0.91
Path length ML (mm)	12.85 ± 23.69	0.89	0.94	0.92
Range of acceleration (ms-2)	1.42 ± 1.62	0.84	0.84	0.83
Range of acceleration ML (ms-2)	0.94 ± 1.48	0.84	0.81	0.83
Jerk Parameters
Jerk AP (m²/s⁵)	0.16 ± 0.50	0.93	0.84	0.85
Jerk (m²/s⁵)	10.08 ± 38.12	0.91	0.86	0.89
Jerk ML (m²/s⁵)	0.52 ± 2.07	0.88	0.86	0.88
Frequency Domain Parameters
Mean frequency AP (Hz)	0.6 ± 0.32	0.89	0.81	0.83
Mean frequency (Hz)	0.62 ± 0.30	0.88	0.86	0.84
Total power ((ms-2)2*Hz-1)	13.85 ± 30.11	0.75	0.9	0.80
Total power ML ((ms-2)2*Hz-1)	17.90 ± 51.22	0.86	0.88	0.86
High frequency power AP ((ms-2)2*Hz-1)	18.76 ± 24.10	0.93	0.79	0.80
Low frequency power AP ((ms-2)2*Hz-1)	367.23 ± 78.8	0.93	0.79	0.80

ISSN: 1472-6815