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Journal of Gastroenterology

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14.05.2018 | Review

Prevalence and predictors of small intestinal bacterial overgrowth in irritable bowel syndrome: a systematic review and meta-analysis

verfasst von: Binrui Chen, John Jae-Woo Kim, Yawen Zhang, Lijun Du, Ning Dai

Erschienen in: Journal of Gastroenterology | Ausgabe 7/2018

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Abstract

Background

The reported prevalence of small intestinal bacterial overgrowth (SIBO) among individuals with irritable bowel syndrome (IBS) is highly variable. The aim of the study is to estimate the prevalence and identify predictors of SIBO in IBS.

Methods

PubMed, Cochrane Library, and EMBASE through July 2017 were searched to identify studies evaluating the prevalence of SIBO in IBS. The pooled prevalence of SIBO among individuals with IBS and the pooled odds ratio (OR) of SIBO among those with IBS compared with healthy controls were calculated. Predictors of SIBO among IBS patients were also evaluated.

Results

Fifty studies (8398 IBS, 1432 controls) met the inclusion criteria. Overall pooled prevalence of SIBO in IBS was 38% (95% CI 32–44) and was higher among individuals with IBS (OR 4.7, 95% CI 3.1–7.2) compared with controls. The pooled prevalence of SIBO in IBS was higher in studies diagnosed by breath tests (40%, 95% CI 33–46) compared with cultures (19%, 95% CI 8–30). Among those with IBS, female gender (OR 1.5, 95% CI 1.0–2.1), older age (standard mean difference 3.1 years, 95% CI 0.9–5.4), and IBS-diarrhea (OR 1.7, 95% CI 1.3–2.3) compared with other IBS subtypes increased the odds of SIBO; proton pump inhibitor (PPI) use (OR 1.1, 95% CI 0.7–1.7) was not associated with SIBO.

Conclusions

More than one-third of IBS patients tested positive for SIBO, and the odds of SIBO in IBS were increased by nearly fivefold. The prevalence of SIBO varied according to the diagnostic modality performed. Female gender, older age, and IBS-diarrhea, but not PPI use, were associated with SIBO among individuals with IBS.

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Titel: Prevalence and predictors of small intestinal bacterial overgrowth in irritable bowel syndrome: a systematic review and meta-analysis
verfasst von: Binrui Chen
John Jae-Woo Kim
Yawen Zhang
Lijun Du
Ning Dai
Publikationsdatum: 14.05.2018
Verlag: Springer Japan
Erschienen in: Journal of Gastroenterology / Ausgabe 7/2018
Print ISSN: 0944-1174
Elektronische ISSN: 1435-5922
DOI: https://doi.org/10.1007/s00535-018-1476-9

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