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. 2019 Sep 20;14(4):459–467. doi: 10.5009/gnl19107

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Copyright © 2020 by The Korean Society of Gastroenterology, the Korean Society of Gastrointestinal Endoscopy, the Korean Society of Neurogastroenterology and Motility, Korean College of Helicobacter and Upper Gastrointestinal Research, Korean Association the Study of Intestinal Diseases, the Korean Association for the Study of the Liver, Korean Pancreatobiliary Association, and Korean Society of Gastrointestinal Cancer.

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Fig. 2 — Assessment of work productivity and activity impairment using the Work Productivity and Activity Impairment-Ulcerative Colitis (WPAI-UC) questionnaire. Absenteeism: percentage of work time missed; presenteeism: percentage of impairment while working; percentage of overall work impairment=(Q2/(Q2+Q4)+[(1–(Q2/(Q2+Q4)))×(Q5/10)])×100; percentage of social activity impairment= (Q6/10)×100. Q, questionnaire item.