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. 2018 Dec 10;18(12):4349. doi: 10.3390/s18124349

Table 2.

The RMSE (Root Mean Square Error) of the estimated GRF and the calibrated CoP by VFA and correlation coefficient (CC) of the estimated GRF and the calibrated CoP by VFA and WMA.

Subject No. RMSE of GRF(N) by VFA RMSE of CoP(mm) by VFA
Scan Gait 1 Gait 2 Squat STS Scan Gait 1 Gait 2 Squat STS
1 21.43 26.46 26.79 25.08 19.00 7.43 8.47 6.14 10.56 7.44
2 23.99 35.55 46.28 32.17 16.97 5.38 5.79 8.71 7.36 9.56
3 27.65 45.70 28.11 29.51 17.39 9.94 13.65 10.28 4.38 0.80
4 28.83 34.28 40.35 44.60 38.30 9.74 11.31 4.64 5.75 5.60
5 27.70 23.57 28.41 40.48 20.69 8.38 8.70 7.05 15.5 10.29
6 33.75 29.74 32.98 32.88 15.66 9.40 15.79 8.37 11.90 14.71
7 32.45 54.58 30.80 32.58 20.56 9.49 4.87 7.23 8.58 7.00
8 32.86 22.19 18.04 20.92 14.37 6.98 4.75 7.06 4.61 8.06
Avg. 28.58 34.01 31.47 32.28 20.37 8.34 9.17 7.44 8.58 7.93
RMSE of CoP(mm) by WMA CC of GRF by VFA
1 15.07 14.27 14.15 14.70 15.40 0.93 0.96 0.95 0.93 0.93
2 11.34 23.07 22.20 18.77 14.19 0.94 0.96 0.98 0.93 0.95
3 17.40 23.06 16.71 16.53 20.60 0.95 0.94 0.97 0.97 0.96
4 12.75 20.86 21.80 12.78 10.9 0.94 0.96 0.94 0.86 0.94
5 11.03 12.05 12.00 17.4 19.44 0.94 0.99 0.99 0.72 0.96
6 18.88 21.11 14.26 20.68 20.10 0.84 0.94 0.96 0.90 0.96
7 10.88 11.49 17.57 14.25 18.05 0.92 0.89 0.97 0.94 0.95
8 14.69 26.17 18.54 21.43 19.12 0.94 0.99 0.99 0.97 0.95
Avg. 14.01 19.01 17.15 17.07 17.23 0.93 0.95 0.97 0.90 0.95
CC of CoP X by VFA CC of CoP Y by VFA
1 0.99 0.99 0.99 0.83 0.74 0.96 0.88 0.70 0.62 0.46
2 0.99 0.99 0.99 0.96 0.96 1.00 0.71 0.60 0.65 0.77
3 0.98 0.98 0.98 0.73 0.77 0.97 0.97 0.94 0.66 0.62
4 0.99 0.96 1.00 0.84 0.64 0.99 0.84 0.70 0.46 0.26
5 1.00 0.99 1.00 0.91 0.94 0.98 0.92 0.87 0.68 0.43
6 0.98 0.98 0.99 0.93 0.98 0.96 0.69 0.54 0.55 0.65
7 0.99 0.98 0.98 0.85 0.88 0.96 0.86 0.75 0.69 0.71
8 0.99 0.99 0.99 0.97 0.98 0.97 0.84 0.67 0.86 0.90
Avg. 0.99 0.98 0.99 0.88 0.86 0.97 0.84 0.72 0.65 0.6
CC of CoP X by WMA CC of CoP Y by WMA
1 0.98 0.97 0.98 0.89 0.65 0.94 0.65 0.40 0.06 0.33
2 0.96 0.95 0.94 0.92 0.94 0.99 0.67 0.35 0.58 0.69
3 0.97 0.96 0.98 0.59 0.68 0.96 0.91 0.75 0.60 0.62
4 0.98 0.93 0.96 0.70 0.18 0.98 0.61 0.85 0.42 0.13
5 0.99 0.97 0.98 0.92 0.92 0.82 0.69 0.71 0.72 0.31
6 0.95 0.94 0.97 0.74 0.96 0.93 0.50 0.49 0.51 0.58
7 0.98 0.96 0.96 0.85 0.89 0.95 0.80 0.55 0.52 0.55
8 0.98 0.97 0.95 0.95 0.95 0.93 0.78 0.31 0.78 0.86
Avg. 0.97 0.96 0.97 0.82 0.77 0.94 0.70 0.55 0.52 0.51

Gait 1 means gait at 1 km/h, Gait 2 means walking at 2 km/h and STS means sit to stand.