The Manitoba Inflammatory Bowel Disease Cohort Study: Prolonged Symptoms Before Diagnosis—How Much Is Irritable Bowel Syndrome?  Twila Burgmann, Ian Clara, Lesley Graff, John Walker, Lisa Lix, Patricia Rawsthorne, Cory McPhail, Linda Rogala, Norine Miller, Charles Noah Bernstein  Clinical Gastroenterology and Hepatology  Volume 4, Issue 5, Pages 614-620 (May 2006) DOI: 10.1016/j.cgh.2006.03.003 Copyright © 2006 American Gastroenterological Association Institute Terms and Conditions

Figure 1 Initial gastrointestinal symptoms before IBD diagnosis. Clinical Gastroenterology and Hepatology 2006 4, 614-620DOI: (10.1016/j.cgh.2006.03.003) Copyright © 2006 American Gastroenterological Association Institute Terms and Conditions

Figure 2 Correlation of increasing age at IBD diagnosis and duration of gastrointestinal symptoms before IBD diagnosis (years). Clinical Gastroenterology and Hepatology 2006 4, 614-620DOI: (10.1016/j.cgh.2006.03.003) Copyright © 2006 American Gastroenterological Association Institute Terms and Conditions