Time trends of physician visits for Crohn's disease and ulcerative colitis in the United States, 1960–2006Sonnenberg, Amnon MD, MSc1,*; Chang, Joanne MD, PhD2Inflammatory Bowel Diseases: February 2008 - Volume 14 - Issue 2 - p 249–252 doi: 10.1002/ibd.20273 Original Clinical Articles: Time Trends of IBD: Original Article Abstract Author Information Background:: The purpose of this study was to analyze physician visits associated with inflammatory bowel disease in the United States in order to shed light on the underlying disease time trends in the United States. Methods:: The National Diseases and Therapeutic Index of IMS America from 1960 until 2006 was used as the data source. Survey data had been obtained from a representative sample of U.S. physicians 4 times per year during a 48‐hour period and extrapolated to a national level. All physician visits for Crohn's disease and ulcerative colitis were expressed as rates per 100,000 people living in the United States. Results:: Physician visits for Crohn's disease increased almost 5‐fold between 1960–1964 and 1990–1994 and have leveled off since then. Except for a slight decrease between 1960–1964 and 1980–1984, physician visits for ulcerative colitis have remained largely unchanged, especially during the most recent 15 years. Similar trends were observed for both men and women. Conclusions:: U.S. time trends of physician visits are similar to other previously published time trends of inflammatory bowel disease. It appears that the overall incidence of inflammatory bowel disease has remained stable in the past 15 years. 1Portland VA Medical Center and the Oregon Health & Science University, Portland, Oregon 2Bayer Healthcare Pharmaceuticals *From the Gastroenterology, Portland VA Medical Center, P3‐GI, 3710 SW U.S. Veterans Hospital Road, Portland, OR 97239 Email: email@example.com Received 13 July 2007; Accepted 8 August 2007 Published online 18 September 2007 in Wiley Online Library (wileyonlinelibrary.com). © Crohn's & Colitis Foundation of America, Inc.