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Table 5 Inter and intra-rater reliability, standard error of measurement, and minimal detectable change of gait parameters

From: Gait analysis with the Kinect v2: normative study with healthy individuals and comprehensive study of its sensitivity, validity, and reliability in individuals with stroke

 Inter-rater reliabilityIntra-rater reliabilityStandard error of measurementMinimal detectable change
Speed (m/s)r = 0.970**r = 0.970**0.040.12 (12.4%)
Stride length (m)r = 0.975**r = 0.982**0.030.09 (8.1%)
Stride time (s)r = 0.948**r = 0.958**0.030.10 (8.1%)
Step length (m)r = 0.977**r = 0.970**0.020.06 (10.6%)
Step time (s)r = 0.947**r = 0.960**0.020.05 (7.8%)
Step width (m)r = 0.943**r = 0.894**0.010.03 (23.9%)
Cadence (step/min)r = 0.939**r = 0.951**3.178.79 (8.6%)
Step asymmetry (m)r = 0.636*r = 0.767**0.030.09 (103.4%)
Swing time (s)r = 0.834**r = 0.802**0.040.11 (33.0%)
Double support time (s)r = 0.904**r = 0.814**0.080.22 (50.7%)
Trunk obliquity (°)r = 0.846**r = 0.805**1.012.80 (35.7%)
Trunk tilt (°)r = 0.905**r = 0.886**0.772.15 (25.1%)
Trunk rotation (°)r = 0.913**r = 0.885**2.627.25 (28.1%)
Pelvic obliquity (°)r = 0.821**r = 0.924**2.105.81 (54.1%)
Pelvic tilt (°)r = 0.877**r = 0.965**6.0716.82 (78.4%)
Pelvic rotation (°)r = 0.968**r = 0.942**2.426.70 (35.8%)
Hip abduction-adduction (°)r = 0.787**r = 0.838**2.055.69 (42.0%)
Hip flexion-extension (°)r = 0.889**r = 0.862**3.269.04 (16.5%)
Hip height variation (cm)r = 0.746**r = 0.856**0.010.04 (56.9%)
Knee valgus-varus alignment (°)r = 0.881**r = 0.915**2.486.90 (32.5%)
Knee flexion-extension (°)r = 0.893**r = 0.938**2.597.17 (15.0%)
Knee height variation (cm)r = 0.829**r = 0.711**0.080.22 (110.7%)
Ankle height variation (cm)r = 0.922**r = 0.859**0.020.05 (29.8%)
  1. Inter and intra-rater reliability of the spatiotemporal and kinematic parameters. Minimal detectable change is expressed in absolute values and percentage (in parentheses). *: p < 0.05. **: p < 0.01