Table 3: The prevalence of overlap in functional gastrointestinal disorders (FGIDs).

Two-way combination (%)

B + C188 (4.06%)
 FD + IBS 134 (2.89%)
 Others 54 (1.17%)
B + F 148 (3.19%)
 NVD + FAP 64 (1.38%)
 Others 84 (1.81%)
C + F135 (2.91%)
 IBS + FAP45 (0.97%)
 Others 90 (1.94%)
A + B 56 (1.21%)
 FH + FD17 (0.37%)
 Others 39 (0.84%)
A + C 46 (0.99%)
 FAB + FC15 (0.32%)
 Others 31 (0.67%)
A + F 43 (0.92%)
 FCP + FI 13 (0.28%)
 Others 30 (0.64%)

Three/four-way combination

B + C + F40 (0.87%)
 IBS + FD + FAP16 (0.34%)
 Others24 (0.53%)
A + B + F 24 (0.56%)
 FH + FD + FI 13 (0.29%)
 Others10 (0.27%)
A + B + C25 (0.54%)
 FH + NVD + IBS11 (0.23%)
 Others14 (0.31%)
A + C + F 16 (0.35%)
 FCP + FC + FI9 (0.19%)
 Others7 (0.16%)
A + B + C + F 11 (0.23%)
 FH + FD + IBS + FAP4 (0.08%)
 Others7 (0.15%)

FCP: functional chest pain, FH: functional heartburn, FI: functional incontinence, IBS: irritable bowel syndrome, FAB: functional abdominal bloating, FAP: functional anorectal pain, and NVD: nausea and vomiting disorders.