Conflict of interest: the authors declare no conflicts of interests.
Subtypes of irritable bowel syndrome on Rome III criteria: A multicenter study
Article first published online: 22 MAR 2012
© 2011 Journal of Gastroenterology and Hepatology Foundation and Blackwell Publishing Asia Pty Ltd
Journal of Gastroenterology and Hepatology
Volume 27, Issue 4, pages 760–765, April 2012
How to Cite
Yao, X., Yang, Y. S., Cui, L. H., Zhao, K. B., Zhang, Z. H., Peng, L. H., Guo, X., Sun, G., Shang, J., Wang, W. F., Feng, J. and Huang, Q. (2012), Subtypes of irritable bowel syndrome on Rome III criteria: A multicenter study. Journal of Gastroenterology and Hepatology, 27: 760–765. doi: 10.1111/j.1440-1746.2011.06930.x
Author contribution: Yun Sheng Yang designed and coordinated the study, Xin Yao entered and analyzed the data and prepared the manuscript. Other authors contributed in case selection, patient enrollment and quality control of the survey.
- Issue published online: 22 MAR 2012
- Article first published online: 22 MAR 2012
- Accepted manuscript online: 19 SEP 2011 10:42AM EST
- Accepted for publication 5 September 2011.
- irritable bowel syndrome;
- Rome II/III;
Background and Aim: The aim of this study was to explore the distribution and clinical characteristics of four subtypes of irritable bowel syndrome (IBS) based on Rome III criteria in Chinese.
Methods: A total of 754 consecutive IBS outpatients from three tertiary hospitals in China were included. Diagnostic criteria were based on Rome II or Rome III.
Results: Among 754 outpatients, 510 (67.6%) patients met the Rome II criteria, 735 (97.5%) patients met the Rome III criteria and 492 (65.3%) patients met both sets of criteria. Among 735 patients who met the Rome III criteria, 66.3% had IBS with diarrhea (IBS-D), 14.7% had IBS with constipation (IBS-C), 4.2% had mixed IBS (IBS-M) and 14.8% had unsubtyped IBS (IBS-U). Most of the IBS-D, IBS-C and IBS-M patients based on the Rome III criteria matched the diarrhea-predominant IBS, constipation-predominant IBS and alternating IBS based on the Rome II criteria, respectively. Among IBS-U patients, 57.0%, 33.3% and 9.7% had constipation-predominant IBS, diarrhea-predominant IBS and alternating IBS, respectively. For IBS-M, the frequencies of bowel movements were stable in 48.4% patients and variable in 51.6% patients. Defecation urgency and straining were most frequent in IBS-M and least frequent in IBS-U patients than other subtypes. About 77.2% of IBS-U patients had abnormal stool frequency (< 3 times/week or > 3 times/day).
Conclusion: The Rome III criteria are more sensitive and practical in diagnosing IBS. IBS-D is the most frequent subtype, which is followed by IBS-U, IBS-C and IBS-M. IBS-U is a new subtype, which warrants further studies.