Volume 53, Issue 1 pp. 103-113
ORIGINAL ARTICLE

5-aminosalicylate–intolerant patients are at increased risk of colectomy for ulcerative colitis

Shuji Hibiya

Shuji Hibiya

Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University, Tokyo, Japan

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Yusuke Matsuyama

Yusuke Matsuyama

Department of Global Health Promotion, Tokyo Medical and Dental University, Tokyo, Japan

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Toshimitsu Fujii

Corresponding Author

Toshimitsu Fujii

Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University, Tokyo, Japan

Correspondence

Toshimitsu Fujii, Department of Gastroenterology and Hepatology, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan.

Email: [email protected]

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Chiaki Maeyashiki

Chiaki Maeyashiki

Department of Gastroenterology and Hepatology, Musashino Red Cross Hospital, Tokyo, Japan

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Eiko Saito

Eiko Saito

Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University, Tokyo, Japan

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Kimiko Ito

Kimiko Ito

Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University, Tokyo, Japan

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Hiromichi Shimizu

Hiromichi Shimizu

Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University, Tokyo, Japan

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Ami Kawamoto

Ami Kawamoto

Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University, Tokyo, Japan

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Maiko Motobayashi

Maiko Motobayashi

Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University, Tokyo, Japan

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Kento Takenaka

Kento Takenaka

Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University, Tokyo, Japan

Endoscopic Unit, Tokyo Medical and Dental University Hospital, Tokyo, Japan

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Masakazu Nagahori

Masakazu Nagahori

Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University, Tokyo, Japan

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Masayuki Kurosaki

Masayuki Kurosaki

Department of Gastroenterology and Hepatology, Musashino Red Cross Hospital, Tokyo, Japan

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Tsunehito Yauchi

Tsunehito Yauchi

Department of Gastroenterology, Soka Municipal Hospital, Saitama, Japan

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Kazuo Ohtsuka

Kazuo Ohtsuka

Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University, Tokyo, Japan

Endoscopic Unit, Tokyo Medical and Dental University Hospital, Tokyo, Japan

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Takeo Fujiwara

Takeo Fujiwara

Department of Global Health Promotion, Tokyo Medical and Dental University, Tokyo, Japan

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Ryuichi Okamoto

Ryuichi Okamoto

Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University, Tokyo, Japan

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Mamoru Watanabe

Mamoru Watanabe

TMDU Advanced Research Institute, Tokyo Medical and Dental University, Tokyo, Japan

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First published: 07 November 2020
Citations: 5
The Handling Editor for this article was Professor Jonathan Rhodes, and it was accepted for publication after full peer-review.

Summary

Background

Although 5-aminosalicylate (5-ASA) is the therapy of first choice in ulcerative colitis (UC), some patients cannot tolerate it because of side effects. Previous reports have not investigated whether 5-ASA intolerance is associated with the risk of colectomy.

Aim

To investigate the associations between 5-ASA tolerance and colectomy among UC patients

Methods

The data of UC patients who visited any of three hospitals during 2014-2018 in and around Tokyo, Japan, were retrospectively obtained from the medical records. Patients were categorized as (a) tolerant to any 5-ASA compounds (“tolerant to 5-ASA”) and (b) patients who were intolerant to one or more 5-ASA compounds leading to refrainment from their further use (“intolerant to 5-ASA”). The association between 5-ASA tolerance and colectomy was examined by Cox proportional hazards model adjusted for sex, age, smoking and extent of colitis.

Results

Of 1788 patients, 1684 were “tolerant to 5-ASA” while 104 were “intolerant to 5-ASA”. Colectomy was performed in 43 (2.6%) of the patients tolerant to 5-ASA and 12 (11.5%) of the patients intolerant to 5-ASA. After adjusting for all covariates, the risk of undergoing colectomy was higher in the “intolerant to 5-ASA” group than in the “tolerant to 5-ASA” group (hazard ratio: 4.92; 95% confidence interval: 2.58-9.38).

Conclusion

Patients in whom 5-ASA was discontinued due to intolerance had a higher risk of undergoing colectomy than patients tolerant to their first, second or third 5-ASA compounds.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.