Table 2.

Mean, SD (standard deviation), Mean of differences of the measured values between pairs of devices together with the 95% confidence intervals (CI) and p-values. Intraclass correlation coefficients (ICC) for mean of different gait variables measured for overlapping phases of system pairs. ICCs reflect absolute agreement (ICC_A) and consistency (ICC_C) of ratings.

SPT	Mean (SD) OptoGaitTM	Mean (SD)Xsens	Mean Diff	95% CI	p	ICC_A Mean	95% CI	ICC_C Mean	95% CI
Stance phase (s)	0.69 (0.002)	0.63 (0.002)	0.056	0.053 to 0.0602	<0.0001	0.512	−0.153 to 0.819	0.87	0.829 to 0.901
Swing phase (s)	0.33 (0.001)	0.34 (0.001)	−0.014	−0.018 to −0.011	<0.0001	0.527	0.236 to 0.691	0.60	0.479 to 0.697
Stance phase (%)	67.80 (0.107)	64.83 (0.124)	2.971	2.655 to 3.287	<0.0001	0.026	−0.082 to 0.140	0.06	−0.224 to 0.289
Swing phase (%)	32.27 (0.104)	35.16 (0.124)	−2.888	−3.213 to −2.564	<0.0001	−0.028	−0.147 to 0.094	−0.074	−0.041 to 0.189
Gait cycle (s)	1.02 (0.003)	0.98 (0.003)	0.041	0.038 to 0.044	<0.0001	0.796	−0.167 to 0.940	0.945	0.928 to 0.958
Double support (%)	35.53 (0.171)	29.64 (0.188)	5.884	5.391 to 6.378	<0.0001	0.016	−0.061 to 0.101	0.056	−0.023 to 0.241
Time of Double support (s)	0.36 (0.002)	0.29 (0.002)	0.072	0.067 to 0.077	<0.0001	0.149	−0.123 to 0.403	0.461	0.293 to 0.590
Loading response (%)	22.27 (0.673)	14.85 (0.115)	7.423	6.093 to 8.752	<0.0001	0.028	−0.014 to 0.193	0.044	−0.254 to 0.272
Time of loading response (s)	0.15 (0.004)	0.14 (0.001)	0.008	−0.0005 to 0.017	0.0660	0.137	−0.129 to 0.341	0.138	−0.131 to 0.343
Pre−swing (%)	17.80 (0.114)	16.11 (0.321)	1.686	0.995 to 2.377	<0.0001	−0.122	−0.433 to 0.125	−0.137	−0.491 to 0.133
Time of pre−swing (s)	0.18 (0.001)	0.14 (0.001)	0.036	0.033 to 0.039	<0.0001	0.138	−0.118 to 0.362	0.362	0.162 to 0.514
Cadence (step/min)	117.50 (0.410)	122.39 (0.416)	−4.888	−5.256 to −4.520	<0.0001	0.804	−0.164 to 0.942	0.946	0.925 to 0.959