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  • Title: The clinical overlap between functional dyspepsia and irritable bowel syndrome based on Rome III criteria.
    Author: Wang A, Liao X, Xiong L, Peng S, Xiao Y, Liu S, Hu P, Chen M.
    Journal: BMC Gastroenterol; 2008 Sep 23; 8():43. PubMed ID: 18808723.
    Abstract:
    BACKGROUND: Epidemiological studies suggest considerable overlap between functional dyspepsia (FD) and irritable bowel syndrome (IBS). To date, no surveys have been performed to investigate the clinical overlap between these two disorders using Rome III criteria. Our aim was to investigate the prevalence and risk factors for the overlap of FD and IBS based on Rome III criteria in a large clinical sample. METHODS: Consecutive patients at the general gastroenterology outpatient clinic were requested to complete a self-report questionnaire. FD and IBS were defined by Rome III criteria. RESULTS: Questionnaires were returned by 3014 patients (52.8% female, 89% response rate). FD-IBS overlap was observed in 5.0% of the patients, while 15.2% and 10.9% of the patients were classified as FD alone and IBS alone, respectively. Compared with non-IBS patients, the odds ratio of having FD among IBS patients was 2.09 (95% CI: 1.68-2.59). Patients with FD-IBS overlap had higher severity scores for the postprandial fullness symptom (2.35 +/- 1.49 vs. 1.72 +/- 1.59, P < 0.001) and overall FD symptom (6.65 +/- 2.88 vs. 5.82 +/- 2.76, P = 0.002) than those with FD alone. The only independent risk factor for FD-IBS overlap vs. FD alone was the presence of postprandial fullness symptom (OR 2.67, 95% CI: 1.34-5.31). CONCLUSION: Clinical overlap of FD and IBS according to Rome III criteria is very common. One risk factor for FD-IBS overlap is the presence of postprandial fullness symptom. This study provides clues for future pathophysiological studies of FD and IBS.
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