Table 1. Mean (SD) of spatiotemporal gait parameters of subjects and concurrent validity measured with GAITRite and OPTOGait.
| Gait Parameters | GAITRite | OPTOGait | ICC (2,1) 95%CI | 95% LOA | CV(%) |
| Speed (m/s) | 1.16 (0.18) | 1.18 (0.17) *** | 0.993 (0.988–0.996) | −0.062–0.022 | 1.37 |
| Cadence (steps/min) | 103.84 (10.17) | 105.08 (10.10) *** | 0.988 (0.980–0.993) | –4.43–1.86 | 1.00 |
| Step length Lt. (cm) | 67.56 (5.11) | 67.77 (5.18) * | 0.991 (0.984–0.994) | –1.587–1.168 | 0.56 |
| Step length Rt. (cm) | 66.65 (6.01) | 67.07 (6.16) *** | 0.996 (0.993–0.997) | –1.712–1.135 | 0.61 |
| Step time Lt. (s) | 0.58 (0.06) | 0.58 (0.06) | 0.997 (0.995–0.998) | –0.010–0.009 | 0.49 |
| Step time Rt. (s) | 0.58 (0.06) | 0.58 (0.05) | 0.995 (0.992–0.997) | –0.013–0.009 | 0.52 |
| Stride length Lt. (cm) | 134.05 (10.55) | 134.40 (10.65) *** | 0.998 (0.997–0.999) | –1.665–0.979 | 0.32 |
| Stride length Rt. (cm) | 134.59 (11.19) | 134.94 (11.30) *** | 0.998 (0.997–0.999) | –1.672–0.981 | 0.32 |
| SLS Lt. (s) | 0.43 (0.04) | 0.41 (0.04) *** | 0.973 (0.956–0.984) | 0.005–0.041 | 3.98 |
| SLS Rt. (s) | 0.43 (0.04) | 0.41 (0.04) *** | 0.969 (0.948–0.981) | 0.006–0.042 | 4.07 |
| DLS (s) | 0.27 (0.05) | 0.31 (0.06) *** | 0.963 (0.939–0.978) | –0.074–0.019 | 11.30 |
| Stance phase Lt. (s) | 0.72 (0.08) | 0.75 (0.08) *** | 0.929 (0.883–0.957) | –0.091–0.027 | 3.60 |
| Stance phase Rt. (s) | 0.72 (0.08) | 0.75 (0.09) *** | 0.953 (0.922–0.971) | –0.084–0.018 | 3.36 |
| Swing phase Lt. (s) | 0.43 (0.04) | 0.41 (0.04) *** | 0.969 (0.948–0.981) | 0.006–0.042 | 4.07 |
| Swing phase Rt. (s) | 0.43 (0.04) | 0.41 (0.04) *** | 0.973 (0.956–0.984) | 0.005–0.041 | 3.98 |
ICC, intra-class correlation coefficient; LOA, limits of agreement; CVME, coefficients of variation of method error; SLS, Single Limb Support; DLS, Double Limb Support. Significant difference between the two measuring instruments (*, p < 0.05; ***, p ≤ 0.001)