title: Is there an association between coeliac disease and inflammatory bowel diseases? A study of relative prevalence in comparison with population controls.
abstract: OBJECTIVE
  The relationship between coeliac disease and inflammatory bowel disease (IBD) is controversial. The aim of this study was to determine the prevalence of coeliac disease in IBD and the prevalence of IBD in coeliac disease.
  
  
  METHODS
  Patients were enrolled from specialist IBD and coeliac clinics. Antigliadins, endomysial, tissue transglutaminase antibody and total IgA levels were measured in IBD patients. Patients with positive antibodies were offered a duodenal biopsy. The notes on coeliac patients were reviewed for colonoscopic and biopsy findings. Controls were recruited from the local population.
  
  
  RESULTS
  The study included 305 patients with coeliac disease, 354 with IBD and 601 healthy controls. The IBD group comprised 154 ulcerative colitis (UC) cases, 173 Crohn's disease, 18 indeterminate colitis and 9 cases of microscopic colitis. Forty-seven patients had positive antibodies and 3 had villous atrophy on biopsy. All three patients had positive anti-tissue transglutaminase antibodies but only two were endomysial antibody (EMA) positive. Ten coeliac patients had IBD (5 UC and 5 lymphocytic colitis). Five controls had coeliac disease and 2 had IBD (1 Crohn's disease and 1 UC). Stepwise multiple logistic regression showed only antibody positivity as being significant (p<0.0001).
  
  
  CONCLUSIONS
  The prevalence of IBD in coeliac disease was increased 10-fold compared with that in controls (odds ratio 9.98, 95% CI 2.8-45.9, p=0.0006), while the prevalence of coeliac disease in IBD was comparable with that in controls (odds ratio 1.02, 95% CI, 0.24-4.29, p=1.0).
authors.affiliation: Gastroenterology and Liver Unit, Royal Hallamshire Hospital, Sheffield, UK. jsleeds@hotmail.com
authors.forename: John S
authors.initials: JS
authors.lastname: Leeds
authors.forename: Barbara S
authors.initials: BS
authors.lastname: Höroldt
authors.forename: Reena
authors.initials: R
authors.lastname: Sidhu
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Hopper
authors.forename: Kerry
authors.initials: K
authors.lastname: Robinson
authors.forename: Bonnie
authors.initials: B
authors.lastname: Toulson
authors.forename: Lynn
authors.initials: L
authors.lastname: Dixon
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Lobo
authors.forename: Mark E
authors.initials: ME
authors.lastname: McAlindon
authors.forename: David P
authors.initials: DP
authors.lastname: Hurlstone
authors.forename: David S
authors.initials: DS
authors.lastname: Sanders
mesh_terms: D000328:Adult; D002446:Celiac Disease / Q000150:complications* / Q000453:epidemiology* / Q000276:immunology; D004739:England / Q000453:epidemiology; D005260:Female; D006801:Humans; D007070:Immunoglobulin A / Q000097:blood; D015212:Inflammatory Bowel Diseases / Q000150:complications* / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012016:Reference Values
chemical_list: D007070:Immunoglobulin A