Table 4 Association of IBS subtypes with bloating and distention among residents of Olmsted County, Minnesota. Results are given as the odd ratios (95% CI)*
IBS subtypeBloating alone vs controlsDistention vs controlsDistention vs bloating alone
IBS-D†5.4 (3.1 to 9.6)7.2 (4.0 to 13.0)1.3 (0.8 to 2.3)
IBS-C†6.1 (3.1 to 11.7)13.9 (7.4 to 25.9)2.3 (1.3 to 4.1)
IBS-M†12.3 (3.3 to 45.6)16.2 (4.4 to 60.0)1.3 (0.6 to 3.0)
IBS-U†2.8 (1.5 to 5.1)2.6 (1.3 to 5.1)0.9 (0.4 to 1.9)

  • *Multiple variable models model adjusted for age. †Each comparison was between each IBS subtype relative to no-IBS.

  • IBS, irritable bowel syndrome; IBS-C, constipation-predominant IBS; IBS-D, diarrhoea-predominant IBS; IBS-M, mixed IBS (meets the criteria for both IBS-C and IBS-D); IBS-U, unsubtyped IBS (not meeting the criteria for the other three categories).