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Table 5 Test-retest reliability parameters for subgroup 1 (n = 11) without 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 1 (n = 11) VPIT test performance without 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]

113.14 ± 64.54

83.56 ± 27.26

29.57 ± 61.17

.19a

0.31c

0.35 (−0.90–0.81)

37.01

102.50

682.87

Ndp

0.12 ± 0.23

0.12 ± 0.23

0.0 ± 0.34

0.0

-

0.25 (−6.04–0.69)

0.20

0.55

3.66

Fg go [N]

10.49 ± 4.84

10.13 ± 4.09

0.36 ± 3.4

0.20a

0.24c

0.84 (0.40–0.96)

1.79

4.95

32.97

Fg return [N]

1.74 ± 0.92

1.55 ± 1.22

0.19 ± 0.93

0.13a

0.13d

0.78 (0.18–0.94)

0.50

1.39

9.26

Nzc [1/s] go

11.18 ± 1.79

10.79 ± 1.97

0.39 ± 1.21

0.06

-

0.89 (0.60–0.97)

0.62

1.73

11.53

Nzc [1/s] return

11.72 ± 1.91

10.80 ± 1.83

0.92 ± 1.29

0.09

-

0.82 (0.28–0.95)

0.79

2.20

14.66

Etraj go [cm]

0.56 ± 0.27

0.47 ± 0.15

0.09 ± 0.20

0.16a

0.10b,c

0.70 (0.00–0.92)

0.12

0.32

2.13

0.29 ± 0.18c

0.35 ± 0.15c

0.06 ± 0.11c

0.83 (0.38–0.95)c

0.07c

0.19c

1.27c

Etraj return [cm]

0.79 ± 0.28

0.75 ± 0.35

0.04 ± 0.42

0.06

-

0.18 (−2.80–0.80)

0.29

0.79

5.26

Fcmean [N]

1.08 ± 0.72

1.18 ± 0.66

−0.10 ± 0.52

0.02

-

0.84 (0.41–0.96)

0.28

0.77

5.13

  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