Table 2 Types of functional gastrointestinal disorders with Rome IV diagnostic criteria.

From: Prevalence and trigger factors of functional gastrointestinal disorders among male civil pilots in China

Typea

n

% of all respondents

% of FGIDs

Any FGID

83

39.15

100

A. Esophageal disorders

29

13.68

34.94

A2. Functional heartburn

6

2.83

7.23

A3. Functional chest pain

8

3.77

9.64

A4. Globus

15

7.08

18.07

B. Gastroduodenal disorders

37

17.45

44.58

B1. Functional dyspepsia

28

13.21

33.73

B3. Nausea and vomiting disorders

7

3.30

8.43

B4. Rumination syndrome

2

0.94

2.41

C. Bowel disorders

43

20.28

51.81

C1. Irritable bowel syndrome

20

9.43

24.10

C2. Functional constipation

9

4.25

10.84

C3. Functional diarrhea

6

2.83

7.23

C4. Functional abdominal bloating

8

3.77

9.64

D. Central mediated disorders of gastrointestinal pain

2

0.94

2.41

D1. Central Mediated abdominal pain syndrome

2

0.94

2.41

Combined FGIDs

31

14.62

37.35

Two-way combination

18

8.49

21.69

A + B

4

1.89

4.82

A4 + B3

4

1.89

4.82

A + C

4

1.89

4.82

A3 + C1

2

0.94

2.41

A4 + C1

2

0.94

2.41

B + C

10

4.72

12.05

B1 + C1

4

1.89

4.82

B1 + C4

4

1.89

4.82

B1 + C2

2

0.94

2.41

Three-way combination

7

3.30

8.43

A + B + C

7

3.30

8.43

A4 + B1 + C1

4

1.89

4.82

A4 + B1 + C2

3

1.42

3.61

Four-way combination

6

2.83

7.23

A + B + C

6

2.83

7.23

A3 + A4 + B1 + C1

2

0.94

2.41

A2 + A3 + B1 + C1

2

0.94

2.41

A2 + B4 + C1 + C3

2

0.94

2.41

  1. aThe serial numbers of A–D were coded according to the Rome IV criteria.
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