[Symptom overlaps between functional heartburn, functional dyspepsia, and irritable bowel syndrome].

OBJECTIVE: To determine symptom overlaps between functional heartburn (FH), functional dyspepsia (FD), and irritable bowel syndrome (IBS).

METHODS: One hundred and ten patients with frequent heartburn but no mucosa breakage under endoscopy were enrolled consecutively. They were required to fill out a questionnaire. The overlapped symptoms of FD and IBS symptoms were screened using Rome ill criteria. The participants were also examined using Hamilton anxiety scale/Hamilton depression scale. All of the participants were followed with 24 h esophageal multichannel intra-luminal impedance monitoring with pH sensor (MII-pH) monitoring and proton pump inhibitor (PPI) trials. The participants were divided into non-erosive reflux disease (NERD) and FH groups. The prevalence of symptom overlaps FD and IBS, between NERD and FH groups was analyzed.

RESULTS: Women were more likely to present with FH than with NERD (P < 0.05). The participants with FH had higher prevalence of anxiety and depression than those with NERD (92% vs. 75%, 88% vs. 65% respectively, P < 0.05). Fifty-two (47.3%) patients with heartburn symptom had FD symptoms; 31 (28.2%) had IBS symptoms, and 10 (9.09%) had both FD and IBS symptoms. Patients with FH were more likely to have symptom overlaps of FD and IBS than those with NERD (62% vs. 35%, 48% vs. 11.7%, respectively; P < 0.01). Epigastric pain syndrome (EPS), a subtype of FD, was slightly more likely to have overlapped NERD and FH symptoms than postprandial discomfort symdrome (PDS). But the difference was not significant (29. 1% vs. 18.2%, P > 0.05). IBS-diarrhea was also slightly more likely to have overlapped NERD and FH symptoms than IBS-constipation. Again, the difference was not significant (16.4% vs. 11.8%, P > 0.05).

CONCLUSION: Female, higher prevalence of anxiety and depression, overlapped FD and IBS symptoms are more likely to appear in FH patients than in NERD patients.