Late Breaking News
IBD Prevalence Increases in VA; UC More Common
HOUSTON — The prevalence of Crohn’s disease (CD) and ulcerative colitis (UC) increased twofold to threefold among VA users between 1998 and 2009, although the incidence of the disease, known collectively as inflammatory bowel disease, has either decreased or remained stable during that time period.
Researchers from the Houston VA HSR&D Center of Excellence, Michael E. DeBakey Veterans Affairs Medical Center and Baylor College of Medicine, all in Houston, reported that the incidence of UC decreased among VA users from 1998 to 2004 but remained stable from 2005 to 2009. The incidence of CD, meanwhile, remained stable during the observed time period.1
Authors of the study, published recently in the journal Inflammatory Bowel Disease, noted that this is the first report on temporal trends in incidence and prevalence of Crohn’s disease (CD) and ulcerative colitis (UC) in the United States in a national network of clinical care facilities as opposed to regional populations.
Veterans with CD and UC were identified during fiscal years 1998 to 2009 in the national VA outpatient and inpatient files. The study said incident and prevalent cases were identified by diagnosis code, while age- and gender-standardized annual prevalence incidence rates were estimated using the VA 1998 population as the standard population.
Researchers found 16,842 unique incident cases of CD and 26,272 of UC. Because of the population studied, 94% of the cases were in men.
The average annual age- and gender-standardized incidence rate of CD was 33 per 100,000 VA users (range, 27-40), while the average for UC was 50 per 100,000 VA users (range, 36-65).
In 2009, the age- and gender-standardized point prevalence rate of CD was 287 per 100,000 VA users, whereas the point prevalence of UC was 413 per 100,000 VA users.
1. Hou JK, Kramer JR, Richardson P, Mei M, El-Serag HB. The Incidence and Prevalence of Inflammatory Bowel Disease Among U.S. Veterans: A National Cohort Study. Inflamm Bowel Dis. 2013 Feb 27. [Epub ahead of print] PubMed PMID: 23448789.