IBD and Immune-Mediated Diseases

J Burisch et al. Clin Gastroenterol Hepatol 2019; 17: 2704-12.  In this nationwide cohort from Denmark with 14,377 adult patients with IBD (median age 45.8 yrs) and 71,885 controls; immune-mediated diseases (IMID) were present in 22.5% of those with IBD.

Most common IMID:

  • psoriasis
  • asthma
  • type 1 diabetes
  • iridocyclitis

Other IMID:

  • multiple sclerosis
  • pyoderma gangrenosum
  • rheumatoid arthritis
  • ankylosing spondylitis,
  • celiac
  • primary scelorsing cholangitis,
  • primary biliary cholangitis
  • sarcoidosis
  • Graves’ disease


  • Patients receiving infliximab were at a reduced risk of developing an IMID with aOR of 0.52 for Crohn’s disease (CD) and 0.47 for Ulcerative Colitis. (UC)
  • 80.3% of IMID were noted prior to onset of IBD
  • The presence of IMID was associated with an increased risk of surgery in patients with CD with aOR of 2.30 but not in patients with UC

My take: About 1 in 4 patients with IBD have at least 1 other immune-mediated disease.  The presence of an immune-mediated disease is associated with a higher likelihood of needing a biologic therapy and with surgery in patients with Crohn’s disease. In patients with numerous immune-mediated diseases, one needs to consider the possibility of other etiologies (eg. CTLA4 defiency)

Related blog posts:

Saint Jerome (not far from Montreal)

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