Background and Aims
Nonalcoholic fatty liver disease is a common cause of chronic liver disease. Celiac disease alters intestinal permeability and treatment with a gluten-free diet often causes weight gain, but so far there are few reports of nonalcoholic fatty liver disease in patients with celiac disease.
Methods
Population-based cohort study. We compared the risk of nonalcoholic fatty liver disease diagnosed from 1997-2009 in individuals with celiac disease (n=26,816) to matched reference individuals (n=130,051). Patients with any liver disease prior to celiac disease were excluded, as were individuals with a lifetime diagnosis of alcohol-related disorder to minimize misclassification of nonalcoholic fatty liver disease. Cox regression estimated hazard ratios for nonalcoholic fatty liver disease were determined.
Results
During 246,559 person-years of follow-up, 53 individuals with celiac disease had a diagnosis of nonalcoholic fatty liver disease (21/100,000 person-years). In comparison, we identified 85 reference individuals diagnosed with nonalcoholic fatty liver disease during 1,488,413 person-years (6/100,000 person-years). This corresponded to a hazard ratio of 2.8 (95%CI=2.0-3.8), with the highest risk estimates seen in children (HR=4.6; 95%CI=2.3-9.1). The risk increase in the first year after celiac disease diagnosis was 13.3 (95%CI=3.5-50.3) but remained significantly elevated even beyond 15 years after the diagnosis of celiac disease (HR=2.5; 95% CI 1.0-5.9).
Conclusion
Individuals with celiac disease are at increased risk of nonalcoholic fatty liver disease compared to the general population. Excess risks were highest in the first year after celiac disease diagnosis, but persisted through 15 years beyond diagnosis with celiac disease.