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Table 1 Comparison of assumptions about bowel habits between the surrogate Rome IV FBD (not experiencing abdominal pain) and IBS-C (experiencing abdominal pain) subjects

From: Influence of the requirement for abdominal pain in the diagnosis of irritable bowel syndrome with constipation (IBS-C) under the Rome IV criteria using data from a large Japanese population-based internet survey

  Total
(Abdominal pain or discomfort in the last 3 months
≥ 1 day/week)
Not experiencing abdominal pain Experiencing abdominal pain  
  Surrogate Rome III IBS-C subjects (n = 428) Surrogate Rome IV FBD subjects
(n = 302)
Surrogate Rome IV IBS-C subjects
(n = 126)
p-value
(Surrogate Rome IV FBD vs Surrogate Rome IV IBS-C)
Female/male (n) 305/123
(71.3/28.7)
212/90
(70.2/29.8)
93/33
(73.8/26.2)
n.s.
Age (mean ± SD, years) 47 ± 14 49 ± 14 43 ± 14 < 0.001
Frequency of bowel movements (median, times/week) 3 3 3 n.s.
Ideal frequency of bowel movements     n.s.
 6 times/week or less 92 (21.5) 71 (23.5) 21 (16.7)  
 7 times/week 319 (74.5) 221 (73.2) 98 (77.8)  
 8 times/week or more 17 (4.0) 10 (3.3) 7 (5.6)  
Considered bowel habit to be an indicator of health     n.s.
 None 37 (8.6) 27 (8,9) 10 (7.9)  
  Sometimes 100 (23.4) 72 (23.8) 28 (22.2)  
 Often 110 (25.7) 86 (28.5) 24 (19.0)  
 Mostly 94 (22.0) 66 (21.9) 28 (22.2)  
 Always 87 (20.3) 51 (16.9) 36 (28.6)  
Degree of anxiety in daily life     p < 0.001
 None 97 (22.7) 72 (23.8) 25 (19.8)  
 Sometimes 238 (55.6) 176 (58.3) 62 (49.2)  
 Often 72 (16.8) 47 (15.6) 25 (19.8)  
 Almost 21 (4.9) 7 (2.3) 14 (11.1)  
  1. Data are expressed as n (%) unless otherwise indicated