Table 4.

Test-retest reliability parameters of the whole stroke sample (n = 31)

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, T_trans decreased^b, ^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