Table 4.
VPIT parameters | Test | Retest | Test-Retest | Kendall’s tau correlation | Kendall’s tau correlation with transformed data | ICC (95 % CI) | SEM agreement | SDD | SDD% |
---|---|---|---|---|---|---|---|---|---|
Mean ± SD | Mean ± SD | Mean difference ± SD | |||||||
Tex [s] | 119.71 ± 72.05 | 98.71 ± 50.77 | 21.01 ± 45.25 | 0.01 | - | 0.83 (0.61–0.92) | 25.34 | 70.18 | 434.50 |
Ndp | 0.54 ± 1.06 | 0.83 ± 1.59 | −0.29 ± 1.55 | 0.16a | 0.12b,c | 0.51 (−0.01–0.76) | 0.95 | 2.62 | 16.22 |
0.13 ± 0.19c | 0.18 ± 0.23c | 0.58 (0.13–0.79)c | 0.14c | 0.38c | 2.64c | ||||
Fg go [N] | 8.98 ± 5.15 | 8.54 ± 4.96 | 0.44 ± 2.43 | 0.10 | - | 0.94 (0.87–0.97) | 0.14 | 3.46 | 21.42 |
Fg return [N] | 1.66 ± 0.83 | 1.60 ± 0.91 | 0.06 ± 0.80 | 0.08 | - | 0.75 (0.47–0.88) | 0.43 | 1.18 | 7.31 |
Nzc [1/S] go | 11.09 ± 1.52 | 10.80 ± 1.70 | 0.28 ± 0.89 | 0.21a | 0.20b,d | 0.91 (0.82–0.96) | 0.48 | 1.33 | 8.23 |
3.32 ± 0.23d | 3.28 ± 0.26d | 0.92 (0.82–0.96)d | 0.07d | 0.20d | 1.37d | ||||
Nzc [1/s] return | 11.36 ± 1.69 | 10.88 ± 1.76 | 0.48 ± 1.09 | 0.14a | 0.20c | 0.87 (0.71–0.94) | 0.63 | 1.75 | 10.84 |
Etraj go [cm] | 0.74 ± 0.38 | 0.67 ± 0.29 | 0.07 ± 0.32 | 0.03 | - | 0.70 (0.39–0.85) | 0.19 | 0.53 | 3.28 |
Etraj return [cm] | 0.99 ± 0.40 | 1.00 ± 0.56 | 0.01 ± 0.49 | 0.18a | 0.20c | 0.67 (0.30–0.84) | 0.29 | 0.80 | 4.95 |
Fcmean [N] | 1.32 ± 1.03 | 1.29 ± 0.95 | 0.02 ± 0.51 | 0.06 | - | 0.93 (0.86–0.97) | 0.26 | 0.73 | 4.52 |
aΤ > 0.1, Ttrans decreasedb, c = log10 transformed, d = square root transformed
T ex [s] execution time in seconds, N dp number of dropped pegs during transport, F g (go/return) [N] mean grasping force of the three force sensors integrated into the handle in Newton, Nzc[1/s](go/return) number of zero-crossings of the acceleration, E traj [cm] trajectory error, F cmean mean collision force, SD Standard Deviation, ICC Intraclass Correlation Coefficient, CI Confidence Interval, SEM Standard Error of Measurement, SDD Smallest Detectable Difference