Risk of Gastrointestinal Diseases in Osteogenesis Imperfecta: A Nationwide, Register-Based Cohort Study.

Osteogenesis imperfecta (OI) is a group of rare genetic disorders most commonly caused by reduced amount of biologically normal collagen type I, a structural component of the gastrointestinal tract and abdominal wall. The risk of gastrointestinal (GI) disease in individuals with OI is not well understood, despite GI complaints being frequently reported by the OI population. To investigate the risk of GI diseases in individuals with OI. A Danish nationwide register-based cohort study utilizing data from the Danish National Patient Register and the Danish National Prescription Register. All individuals registered with an OI diagnosis in Denmark from 1995 through 2018, along with a reference population matched 1:5 based on sex, birth year, and month. Sub-hazard ratios (SHR) for peptic ulcer disease, diverticular disease, gastrointestinal cancers, intestinal obstruction with ileus, constipation, abdominal wall hernia, and other reasons for abdominal discomfort. The study included 864 individuals with OI (472 women) and 4,276 in the reference population (2,332 women). The SHR was significantly increased for ulcer (3.28 [95% CI 2.21-4.28]), constipation (2.67 [1.91-3.74]), and hernia (among women: 1.85 [1.22-2.80]). Higher SHRs were also observed for inflammatory bowel disease, biliary and pancreatic diseases, appendicitis, and unspecified abdominal pain. SHRs were not statistically significantly increased for diverticular disease, gastrointestinal cancers, intestinal obstruction with ileus, kidney stones or hemorrhoid disease. Individuals with OI have a higher risk of peptic ulcer disease, constipation, hernia among women, inflammatory bowel diseases, biliary and pancreatic diseases, appendicitis, and unspecified abdominal pain, compared with the general population.