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. 2020 Feb 27;19(1):45–52. doi: 10.5217/ir.2019.00135

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© Copyright 2021. Korean Association for the Study of Intestinal Diseases. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 4. — Smoking behavior and its influence on quality of life (QUOL) in IBD patients. (A) 11.54% (UC) to 29.90% (CD) of IBD patients currently smoke in our patient cohort. (B) Smoking reduces QUOL significantly in CD and by trend in UC. The boxplot’s median is depicted using a horizontal black line. Cutoff of the score for the QUOL was 60 points in the Short Inflammatory Bowel Disease Questionnaire (SIBDQ) and is depicted using a red line (≥60 normal QUOL, <60 moderately to severely reduced QUOL). A t-test was used for statistical analysis.^aP<0.01. IBD, inflammatory bowel disease; UC, ulcerative colitis; CD, Crohn’s disease.