In the multivariate analysis, the OR increase of BMI <18.5 kg/m 2 remained marginally significant, and the OR increase with past appendicitis showed marginal significance.
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The association between environmental factors and the development of Crohn's disease with focusing on passive smoking: A multicenter case-control study in Japan.
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The sentences
The risk increased as the period of passive smoking increased (trend P = 0.038), indicating marginal significance at over 17 years (2.68, 0.91–7.89).