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zoom RSS シフト勤務は過敏性腸症候群(IBS)のリスクを増大させる

<<   作成日時 : 2010/03/28 23:25   >>

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 新たな研究によれば、シフト勤務は過敏性腸症候群(IBS)のリスクを増大させるという。ミシガン大のHoogerwerf博士は、「しばしばシフト勤務をしている人々が腹痛、便秘、下痢などの胃腸症状を訴えている」と言う。「これらはIBSと同じ徴候である」。
 399人の看護師に関する研究で、シフト勤務−特に回転シフト−が、かなり、標準の日中勤務より、IBSと腹痛を起こしそうであるとわかった。
 Dr Hoogerwerfは、「腸が体内時計を持っていて、1日の最初の6時間に便通を生じやすいことがわかっている」と言う。「シフト勤務は慢性的な生物学的リズムの不調を起こす可能性があり、その結果、常に時計が捨てられる運命にあり順応するために、下痢・便秘・腹痛・不快を引きおこす」。
 研究結果は、睡眠障害がシフト勤務とIBSまたは腹痛の関係を完全には説明できない。Hoogerwerfは、「IBSと腹痛が24時間周期リズム障害の潜在的な症候であるかどうかが今後の研究課題」としている。
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Shift Work Linked to Irritable Bowel Syndrome
Irregular schedule disrupts biological cycle, study finds
-- Robert Preidt
http://health.msn.com/health-topics/digestive-health/articlepage.aspx?cp-documentid=100256298

画像Irregular schedule disrupts biological cycle, study finds.

FRIDAY, March 26 (HealthDay News) -- Shift work increases the risk for irritable bowel syndrome (IBS), new research shows.

"We know that people participating in shift work often complain of gastrointestinal symptoms such as abdominal pain, constipation and diarrhea," Dr. Sandra Hoogerwerf, an assistant professor of internal medicine at the University of Michigan Medical School, said in a university news release. "These are the same symptoms of IBS."

In a study involving 399 nurses, she and her colleagues found that those doing shift work -- especially rotating shifts -- were significantly more likely to develop IBS and abdominal pain than were those who worked a standard daytime schedule.

The study was published online recently in the American Journal of Gastroenterology.

"We know the colon has its own biological clock and that's what increases the likelihood of having a bowel movement in the first six hours of the day," Hoogerwerf said. "Shift work can cause chronic disruption of that biological rhythm, resulting in that clock to constantly be thrown off and needing to adjust, creating symptoms of diarrhea, bloating, constipation and abdominal pain and discomfort."

The study findings suggest that sleep disturbances do not completely explain the link between shift work and IBS or abdominal pain.

"The question now for further research is if IBS and abdominal pain is an underlying manifestation of a circadian rhythm disorder," Hoogerwerf said.

More information

The U.S. National Institute of Diabetes and Digestive and Kidney Diseases has more about irritable bowel syndrome.
SOURCE: University of Michigan, news release, March 2010

Copyright @2010 HealthDay. All Rights Reserved.

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Am J Gastroenterol advance online publication 16 February 2010; doi: 10.1038/ajg.2010.48

The Impact of Rotating Shift Work on the Prevalence of Irritable Bowel Syndrome in Nurses

Borko Nojkov MD1, Joel H Rubenstein MD1,2, William D Chey MD1 and Willemijntje A Hoogerwerf MD1

1. 1Division of Gastroenterology, University of Michigan, Ann Arbor, Michigan, USA
2. 2Veterans Affairs Center for Clinical Management Research, Ann Arbor, Michigan, USA

Correspondence: Willemijntje A. Hoogerwerf, MD, Division of Gastroenterology, University of Michigan, 2215 Fuller Road, Ann Arbor, Michigan 48105, USA. E-mail: willemij@umich.edu

Received 1 November 2009; Accepted 29 January 2010; Published online 16 February 2010.

Abstract
OBJECTIVES:
Shift work has been associated with gastrointestinal symptoms such as abdominal pain, constipation, and diarrhea. These symptoms overlap with those reported by patients with functional bowel disorders. Because shift work will lead to misalignment between the endogenous circadian timing system and the external 24 h environment, we hypothesized that nurses participating in shift work will have a higher prevalence of functional bowel disorders when compared with nurses participating in day shifts.
METHODS:
Nurses engaged in patient care were invited to complete Rome III, irritable bowel syndrome–quality of life measure (IBS-QOL) and modified Sleep-50 questionnaires. Respondents were classified as working day, night, or rotating shifts. The prevalence of IBS, functional constipation, functional diarrhea, and individual gastrointestinal symptoms was determined.
RESULTS:
Data were available for 399 nurses (214 day shift, 110 night shift, and 75 rotating shift workers). Rotating shift nurses had a significantly higher prevalence of IBS compared to day shift nurses (48% vs. 31%, P<0.01). Multivariable logistic regression correcting for age, gender, and sleep quality proved this association robust. IBS-QOL scores among groups were similar. Prevalence of functional constipation and functional diarrhea was similar between groups. Rotating shift nurses had a significantly higher prevalence of abdominal pain compared to day shift (81% vs. 54%, P<0.0001) and night shift workers (61%, P=0.003).
CONCLUSIONS:
Participation in shift work, especially rotating shift work, is associated with the development of IBS and abdominal pain that is independent of sleep quality. Circadian rhythm disturbances may have a function in the pathogenesis of IBS and abdominal pain.

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シフト勤務は過敏性腸症候群(IBS)のリスクを増大させる 医師の一分/BIGLOBEウェブリブログ
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