• Ahmed Yousaf, Rahul Raiker, Stephen M Davis, Swapna Gayam, and Zachary Zinn.
• Department of Dermatology, West Virginia University, 64 Medical Center Drive, PO Box 9100, 26506, Morgantown, WV, USA.
• Wien. Klin. Wochenschr. 2021 Jun 1; 133 (11-12): 586-593.

BackgroundPsoriasis is associated with cardiovascular disease, inflammatory bowel disease (IBD), metabolic syndrome, and psychiatric disease. Furthermore, psoriasis is associated with immune dysregulation and systemic inflammation.ObjectiveTo determine the association of psoriasis and psoriatic arthritis with IBD and the association of the combination of psoriasis or psoriatic arthritis with IBD and other gastrointestinal illnesses.MethodsDischarge data from the 2000-2014 Nationwide Inpatient Sample, Healthcare Cost and Utilization Project (HCUP), which approximates a 20% stratified sample of all US hospitalizations, were analyzed. Multivariable logistic regression was used to examine the association between psoriasis and psoriatic arthritis with IBD and 23 gastrointestinal illnesses adjusting for sociodemographic characteristics.ResultsPsoriasis was associated with IBD (Crohn's disease adjusted odds ratio (aOR) = 2.13, 95% confidence interval (CI) [2.0-2.3], p < 0.001). When adjusting for sociodemographics and IBD, psoriasis was associated with 21 of 23 gastrointestinal diseases examined, most notably celiac disease, autoimmune hepatitis, and non-alcoholic fatty liver disease. Psoriatic arthritis was also associated with IBD (Crohn's disease, aOR = 1.95, 95% CI [1.7-2.2], and ulcerative colitis, aOR = 2.66, 95% CI [2.4-2.9]).ConclusionPsoriasis and psoriatic arthritis inpatients have an associated increase in IBD and numerous other gastrointestinal illnesses.

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