Table 2: The prevalence of functional gastrointestinal disorders (FGIDs) using Rome classification and the modified questionnaire.

Functional gastrointestinal disordersAircrew ( )Ground personnel ( ) valueTotal ( )

A. Esophageal disorders 34 (4.32)120 (3.12)0.087154 (3.26)
 A1: globus9 (1.14)30 (0.78)0.30939 (0.84)
 A2: functional chest pain 6 (0.76)40 (1.04)0.47446 (0.99)
 A3: functional heartburn*19 (2.41)45 (1.17)0.00664 (1.38)
 A4: functional dysphagia 1 (0.13)10 (0.26)0.41911 (0.24)
B. Gastroduodenal disorders 105 (13.34)430 (11.2)0.084535 (11.54)
 B1: functional dyspepsia 50 (6.35)221 (5.75)0.509271 (5.85)
 B2: belching disorders 22 (2.80)97 (2.72)0.659119 (2.57)
 B3: nausea and vomiting disorders*40 (5.08)281 (7.31)0.025321 (6.93)
  B3a: chronic idiopathic nausea*21 (2.67)71 (1.84)0.02492 (1.99)
  B3b: functional vomiting*1 (0.13)28 (0.87)0.03129 (0.62)
  B3c: cyclic vomiting syndrome*23 (2.92)191 (4.97)0.013214 (4.62)
 B4: rumination syndrome in adults4 (0.51)18 (0.47)0.99922 (0.47)
C. Bowel disorders*102 (12.96)355 (9.10)0.001457 (9.86)
 C1: irritable bowel syndrome*45 (5.72)142 (3.70)0.009187 (4.04)
 C2: functional abdominal bloating 68 (8.64)228 (5.93)0.005296 (6.39)
 C3: functional constipation*16 (2.03)29 (0.75)0.00145 (0.97)
 C4: functional diarrhea 15 (1.91)56 (1.46)0.34971 (1.53)
D. Functional abdominal pain 2 (0.27)0 (0.00) 2 (0.05)
F. Anorectal disorders*23 (2.92)258 (6.71)0.000281 (6.07)
 F1: functional incontinence*3 (0.38)106 (2.76)0.000109 (2.35)
 F2: functional anorectal pain22 (2.80)153 (3.98)0.113175 (3.78)
  F2a: levator ani syndrome 2 (0.27)21 (0.55)0.43423 (0.50)
  F2b: proctalgia fugax 20 (2.54)134 (3.48)0.179154 (3.32)

may have more than one group of disorders.
* P < 0.05 aircrew versus ground personnel.
: not compared.