Skip to main content

Table 5 Linear Fit Method [43] results comparing inertial-based 3D full-body kinematics and the optoelectronic criterion system. Outcome parameters are: α1 (scaling factor), α0 (scalar addition) and R2. Average reconstruction error is given by the Mean Absolute Error (MAE)

From: Validation of quantitative gait analysis systems for Parkinson’s disease for use in supervised and unsupervised environments

   Hip
Flexion
Hip
Adduction
Hip
Rotation
Knee Extension Ankle Dorsiflexion Arm
Flexion
Arm Adduction Arm
Rotation
Elbow
Flexion
Pronation Wrist
Flexion
α1 Left 0,910 0,481 0,258 1117 0,816 0,395 0,653 0,622 0,668 0,933 0,593
Right 0,903 0,487 0,035 1144 0,841 0,478 0,611 0,527 0,810 1040 0,725
α0 Left − 1716 −0,467 − 6486 4331 0,051 7335 −11,419 − 3013 6777 − 8582 2687
Right − 3101 0,948 − 5370 − 2399 1187 −11,133 9456 − 0,108 7735 13,084 0,122
R2 Left 0,919 0,737 0,514 0,957 0,860 0,798 0,875 0,770 0,868 0,685 0,524
Right 0,913 0,561 0,608 0,950 0,789 0,843 0,856 0,683 0,887 0,678 0,534
MAE (°) Left 2296 3297 3511 2950 2924 2990 2170 2339 1830 2368 2342
Right 2504 3630 3901 2957 2946 2713 2248 2504 2118 2615 1944