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Table 6 Test-retest reliability parameters for subgroup 2 (n = 20) with support of the non-affected arm

From: Concurrent validity and test-retest reliability of the Virtual Peg Insertion Test to quantify upper limb function in patients with chronic stroke

 

Subgroup 2 (n = 20) VPIT test performance with support

VPIT parameters

Test Mean ± SD

Retest Mean ± SD

Test-Retest Mean difference ± SD

Kendall’s tau correlation

Kendall’s tau correlation with transformed data

ICC (95 % CI)

SEM agreement

SDD

SDD%

Tex [s]

123.33 ± 77.24

107.04 ± 58.93

16.30 ± 34.62

0.03

-

0.92 (0.79–0.97)

19.25

53.32

317.76

Ndp

0.77 ± 1.27

1.22 ± 1.87

−0.45 ± 1.91

0.18a

0.11b,c

0.45 (−0.37–0.78)

1.16

3.23

19.25

0.18 ± 0.22c

0.26 ± 0.26c

−0.07 ± 0.28c

0.49 (−0.26–0.80)c

0.17c

0.48c

3.11c

Fg go [N]

8.15 ± 5.25

7.67 ± 5.28

0.49 ± 1.79

0.11a

0.12d

0.97 (0.93–0.99)

0.91

2.53

15.08

Fg return [N]

1.62 ± 0.80

1.63 ± 0.73

−0.02 ± 0.72

0.10a

-

0.73 (0.29–0.89)

0.40

1.10

6.56

Nzc [1/s]go

11.03 ± 1.39

10.81 ± 1.59

0.22 ± 0.68

0.34a

0.32b,c

0.94 (0.86–0.98)

0.37

1.01

6.02

1.04 ± 0.06c

1.03 ± 0.07c

0.01 ± 0.03c

0.94 (0.85–0.98)c

0.02c

0.04c

0.26c

Nzc[1/s] return

11.17 ± 1.57

10.93 ± 1.77

0.25 ± 0.91

0.18a

0.18d

0.92 (0.80–0.97)

0.47

1.31

7.81

Etraj go [cm]

0.84 ± 0.39

0.78 ± 0.28

0.06 ± 0.37

0.01

-

0.58 (−0.06–0.84)

0.22

0.60

3.58

Etraj return [cm]

1.10 ± 0.42

1.15 ± 0.61

−0.04 ± 0.53

0.16a

0.15b,c

0.66 (0.13–0.87)

0.30

0.83

4.95

0.02 ± 0.16c

0.02 ± 0.19c

0.00 ± 0.17c

0.69 (0.21–0.88)c

0.10c

0.27c

1.75c

Fcmean [N]

1.45 ± 1.16

1.36 ± 1.08

0.09 ± 0.50

0.10a

0.01b,d

0.95 (0.87–0.98)

0.25

0.69

4.11

1.11 ± 0.47d

1.08 ± 0.47d

0.04 ± 0.23d

0.94 (0.84–0.98)d

0.12d

0.32d

2.07d

  1. aΤ > 0.1, Ttrans decreasedb, c = log10 transformed, d = square root transformed
  2. 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, N zc[1/s] (go/return) number of zero-crossings of the acceleration, E traj [cm] trajectory error, F cmean [N] mean collision force; SD Standard Deviation, ICC Intraclass Correlation Coefficient, CI Confidence Interval, SEM Standard Error of Measurement, SDD Smallest Detectable Difference