Table 3 Standard deviations and p values on gain and phase at 20 kHz for upper extremity IBC channels from different effects

Upper arm channel (A1A2)

S1

Gain (dB)

1.27

3.11

3.75

0.17

0.18

0.11

0.21

Phase (degree)

1.42

2.85

2.16

2.65

2.41

0.55

0.97

S2

Gain (dB)

1.97

3.44

4.09

0.11

0.11

0.08

0.15

Phase (degree)

1.15

1.97

3.21

0.82

0.79

0.30

0.69

S3

Gain (dB)

1.51

3.79

4.49

0.15

0.17

0.49

0.30

Phase (degree)

1.25

2.14

3.24

0.25

0.28

0.64

0.97

S4

Gain (dB)

2.00

3.68

4.96

0.33

0.77

0.10

0.63

Phase (degree)

2.21

2.91

2.10

0.83

0.68

0.41

0.54

p value

On gain

0.014

0.826

0.793

On phase

0.946

0.991

0.992

Channel through the joint (A1A3)

S1

Gain (dB)

3.89

6.24

9.56

0.35

0.38

0.76

0.53

Phase (degree)

4.62

3.38

6.94

2.29

2.65

1.93

1.81

S2

Gain (dB)

3.20

7.46

11.70

0.47

0.38

0.33

0.43

Phase (degree)

2.11

4.97

9.22

1.83

2.11

1.25

2.20

S3

Gain (dB)

1.09

4.36

8.11

0.19

0.36

0.26

0.13

Phase (degree)

1.81

3.41

7.09

0.90

1.13

1.92

1.35

S4

Gain (dB)

1.34

5.68

10.51

0.26

0.24

0.30

0.68

Phase (degree)

3.25

6.48

11.35

3.65

3.66

0.90

1.05

p value

On gain

0.001

0.904

0.987

On phase

0.899

0.836

0.913