過敏性腸症候群とNIH-AARPコホート研究における全死因および原因別死亡率との時間依存的関連
Daniela S Gutiérrez-Torres1, Fangyu Li1,2, Linda M Liao1
1Metabolic Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland, USA.
The American journal of gastroenterology
|January 10, 2026
まとめ
過敏性腸症候群(IBS)の人は、全死因死亡率のリスクが低く、そのリスクは時間とともに減少することが示されました。IBSと死亡率との逆の関連は、寄与因子に関するさらなる調査を必要とします。
科学分野:
- 消化器病学
- 疫学
- 公衆衛生
背景:
- 過敏性腸症候群(IBS)と死亡率との関連については、相反する証拠が存在します。
- この研究は、大規模コホートにおけるIBSと死亡率の関係を明らかにすることを目的としました。
研究 の 目的:
- IBSと全死因および原因別死亡率との関連を推定すること。
- この関連が長期追跡期間中にどのように変化するかを調査すること。
主な方法:
- IBS診断(1994-2008年)にはMedicare請求データを使用し、死亡アウトカム(2019年まで)にはNational Death Indexを使用しました。
- 死亡リスクの分析には、多変量Cox比例ハザード回帰モデルを採用しました。
- 食事や医療アクセスに関連する交絡因子を調整しました。
主要な成果:
- 132,697人のうち3.8%に過敏性腸症候群(IBS)の診断が確認されました。
- 当初、IBSは2〜5年以内の全死因死亡率のリスクを25%低下させることと関連していました(HR=0.75)。
- この逆の関連は時間とともに減衰し、17年以上経過した後のリスクは8%低下しました(HR=0.92)。
- がんおよび心血管疾患による死亡率のリスク低下も観察され、時間とともに減衰しました。
結論:
- IBSと全死因、がん、心血管疾患による死亡率との時間依存的な逆の関連が見られました。
- 医療アクセスと個人の健康擁護は、短期的な関連を交絡させるように見えました。
- 長期追跡期間中にこれらの関連に影響を与える要因を理解するためには、さらなる研究が必要です。
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