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Table 2 Comparison of EGEG parameters in gastric and intestinal channel between ADD and controls

From: Potential value of gastrointestinal myoelectrical activity in the diagnosis of anxiety-depression disorder: a population-based study

 

Parameters

ADD

(n = 91)

Controls (n = 586)

Test value

P

Gastro channel

Mean amplitude

158.68 ± 73.43

172.64 ± 83.15

-1.389 b

0.165

Mean frequency

3.43 ± 0.28

3.46 ± 0.31

-0.789 b

0.430

Percentage of disturbed gastric electrical rhythm

20.86 ± 3.7

20.94 ± 3.7

1.553 a

0.121

Response area

56.8 ± 25.77

61.93 ± 29.83

-1.319 b

0.187

Dominant frequency

2.98 ± 0.20

3 ± 0.25

-0.720 b

0.471

Dominant power

62.52 ± 5.43

61.42 ± 6.25

1.597 a

0.111

Percentage of normal gastric slow wave

61.02 ± 7.31

59.32 ± 8.33

1.840 a

0.066

Slow wave frequency instability coefficient

1.94 ± 0.79

1.98 ± 0.8

-0.499 b

0.618

Intestinal channel

Mean amplitude

153.49 ± 78.69

179.83 ± 103.90

-1.941b

0.050

Mean frequency

12.46 ± 2.03

12.80 ± 2.34

-1.133 b

0.257

Percentage of disturbed intestinal electrical rhythm

23.94 ± 5.10

23.98 ± 5.53

-0.134 b

0.893

Response area

57.27 ± 29.05

67.70 ± 38.32

-2.119b

0.034

Dominant frequency

11.24 ± 2.37

11.60 ± 2.76

-0.831 b

0.406

Dominant power

30.26 ± 5.79

30.47 ± 5.85

-0.548 b

0.584

Percentage of normal intestinal slow wave

53.93 ± 10.26

52.57 ± 12.39

-0.900 b

0.368

Slow wave frequency instability coefficient

0.16 ± 0.09

0.16 ± 0.10

-0.274 b

0.784

  1. Note: a refers to ‘t’ value from Student’s t-tests; b refers to ‘Z’ value from Mann-Whitney U-tests. ADD, anxiety-depression disorders