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Table 2 Test-retest reliability measures for the Kinect-derived gait variables

From: Instrumenting gait assessment using the Kinect in people living with stroke: reliability and association with balance tests

Variables Test Retest ICC(2, k ) SEM MDC 95
Mean ± SD Mean ± SD (95% CI)
Affected step length (mm) 507 ± 147 513 ± 169 0.97 (0.95 to 0.99) 29 80
Unaffected step length (mm) 520 ± 166 520 ± 144 0.98 (0.96 to 0.99) 21 58
Step length asymmetry (%) 15.0 ± 15.6 17.4 ± 19.4 0.89 (0.76 to 0.95) 5.2 14.3
Affected foot swing velocity (m/s) 3.18 ± 0.91 3.16 ± 0.90 0.97 (0.94 to 0.99) 0.16 0.44
Unaffected foot swing velocity (m/s) 3.08 ± 1.3 3.09 ± 1.29 0.99 (0.97 to 0.99) 0.13 0.36
Foot swing velocity asymmetry (%) 12.6 ± 13.7 14.0 ± 13.0 0.80 (0.58 to 0.90) 6.1 17.0
Mean velocity (m/s) 0.89 ± 0.33 0.90 ± 0.32 0.98 (0.96 to 0.99) 0.05 0.13
Peak velocity (m/s) 1.22 ± 0.39 1.22 ± 0.39 0.98 (0.95 to 0.99) 0.06 0.15
Peak – Mean velocity difference (%) 41.8 ± 18.4 39.8 ± 18.1 0.96 (0.92 to 0.98) 3.7 10.2
  1. Abbreviations: SD = standard deviation; ICC = intraclass correlation coefficient; CI = confidence interval; SEM = standard error of measurement; MDC = minimum detectable change.