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Cigarette smoking and ulcerative colitis. A case control study.

D Lorusso1, S Leo, G Misciagna

  • 1Scientific Gastroenterological Institution, Castellana Grotte (Bari), Italy.

Hepato-Gastroenterology
|August 1, 1989
PubMed
Summary
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Cigarette smoking appears to protect against ulcerative colitis (UC). Non-smokers and former smokers have a significantly higher risk of developing UC compared to current smokers.

Area of Science:

  • Gastroenterology
  • Epidemiology
  • Public Health

Background:

  • Ulcerative colitis (UC) is a chronic inflammatory bowel disease with complex etiology.
  • The role of lifestyle factors, including smoking, in UC development is an area of ongoing research.

Purpose of the Study:

  • To investigate the association between cigarette smoking habits and the risk of developing ulcerative colitis (UC).

Main Methods:

  • A case-control study was conducted with 84 UC patients and 168 controls (84 hospital-based, 84 general population).
  • Smoking status, including current, former, and never smoking, was assessed.
  • Conditional multiple logistic regression analysis was used, adjusting for age, sex, education, social class, alcohol, and coffee consumption.

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Main Results:

  • Non-smokers exhibited a substantially increased risk of UC compared to smokers (Odds Ratio [OR] 4.6-10).
  • A higher proportion of ex-smokers were found among UC patients, indicating an elevated risk associated with smoking cessation.
  • The protective effect of smoking on UC remained significant after adjusting for confounding factors (OR 4.2-5.7).

Conclusions:

  • Cigarette smoking demonstrates a protective effect against the development of ulcerative colitis.
  • Individuals who have never smoked or have quit smoking are at a greater risk for UC.