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Pubmed-Association of low occlusal force as an oral hypofunction with the prevalence of irritable bowel syndrome in Japanese adults

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J Gastroenterol Hepatol. 2023 Mar 12. doi: 10.1111/jgh.16175. Online ahead of print.


BACKGROUND AND AIM: We investigated whether oral-dental conditions may be associated with the prevalence of irritable bowel syndrome (IBS) in a cross-sectional study in Japan.

METHODS: Information on lifestyle and abdominal symptoms was collected, and oral-dental examinations were performed from 2013 to 2017. To investigate the association between oral-dental conditions and IBS, this study used logistic regression analyses adjusted for relevant confounding factors, such as age, sex, BMI, stress, and eating between meals.

RESULTS: The prevalence of IBS was 484 (13.4%) among 3626 participants. The mean maximum occlusal force in the IBS group was significantly lower than that in the non-IBS group (0.306±0.192 kN vs. 0.329±0.205 kN, p =0.014). The maximum occlusal force of the constipation-type IBS was significantly lower than that of other types of IBS without constipation type (0.269±0.164 kN vs. 0.317±0.198 kN, p =0.010). Compared with those who had high values of maximum occlusal force (≧0.265 kN), those with a low value of maximum occlusal force (<0.265 kN) had a significantly greater risk for IBS (OR, 1.426; 95%CI, 1.135-1.792; p=0.002), by multivariate analyses, across different categories of oral-dental condition in women, not in men. Women who had lowest third occlusal force (<0.206 kN) had approximately 35% significanlty greater odds of having IBS compared with those who had highest third occlusal force (≧0.386 kN).

CONCLUSIONS: Results suggest that a reduction in the maximum occlusal force increases the risk of IBS in Japanese women.

PMID:36908051 | DOI:10.1111/jgh.16175

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