Smoking behaviour and knowledge of the health effects of smoking in patients with inflammatory bowel disease

The detrimental effect of smoking on development and progression of Crohn's disease (CD) is generally accepted.To evaluate the awareness of smoking risks in a Belgian inflammatory bowel disease (IBD) population.In the out-patient clinic of a tertiary referral centre, 625 consecutive patients with CD, 238 patients with ulcerative colitis (UC) and 289 non-IBD controls, filled out a simple questionnaire. This questionnaire included data on smoking...