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Table 2 Associations between the degree of anxiety and GI symptoms of the surrogate Rome IV FBD and IBS-C 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

  Surrogate Rome IV FBD subjects Surrogate Rome IV IBS-C subjects
GI symptoms/Degree of anxiety None Sometimes Often Almost Kendall’s τ None Sometimes Often Almost Kendall’s τ
Abdominal bloating      0.09      0.21*
 No 20 28 7 2   6 6 0 1  
 Yes 52 148 40 5   19 56 25 13  
Abdominal discomfort      0.03      0.17*
 No 27 58 15 3   6 10 1 1  
 Yes 45 118 32 4   19 52 24 13  
Abdominal pain      N/A      N/A
 No 72 176 47 7   N/A N/A N/A N/A  
 Yes N/A N/A N/A N/A   25 62 25 14  
Frequency of bowel movement in a week      0.01      −0.10
  > 1 time 2 4 2 0   1 2 1 1  
 1 time 3 22 3 1   3 7 6 1  
 2 times 19 42 12 1   4 22 4 4  
 3 times 17 29 6 1   6 9 10 3  
 4 times 8 19 6 0   2 4 1 2  
 5 times 6 20 5 3   1 6 0 0  
 6 times 5 11 3 0   2 3 1 1  
 7 times 9 19 9 1   2 5 2 2  
 8 times or more 3 10 1 0   4 4 0 0  
  1. *p < 0.05, the Kendall’s τ-b
  2. GI gastrointestinal