Table 2.
Prevalence of Overlaps
| Groupa | Total | ||||
|---|---|---|---|---|---|
|
| |||||
| Ib | II | III | IVb | ||
| FC | |||||
| Frequency (n [%]) | 314 (69.6) | 72 (16.0) | 43 (9.5) | 22 (4.9) | 451 (100.0) |
| IBS | |||||
| Frequency (n [%]) | 178 (57.8) | 64 (20.8) | 37 (12.0) | 29 (9.4) | 308 (100.0) |
| Total | |||||
| Frequency (n [%]) | 492 (64.8) | 136 (17.9) | 80 (10.5) | 51 (6.7) | 759 (100.0) |
a
Grouping is as follows; group I, patients with no overlap with other disorders; group II, patients overlapped with gastroesophageal reflux disease (GERD); group III, patients overlapped with functional dyspepsia (FD); group IV, patients overlapped with both GERD and FD.
b
Significant differences between functional constipation (FC) and irritable bowel syndrome (IBS) in the prevalence are found in group I (P = 0.001) and IV (P = 0.011).
IBS-C, IBS with constipation.