Background Non-alcoholic fatty liver disease (NAFLD) is an emerging extraintestinal manifestation (EIM) of Crohn’s disease (CD). We aimed to investigate the prevalence and comorbid predictors of NAFLD in patients with CD. Methods We conducted a nationwide retrospective cohort study to determine the prevalence, characteristics, comorbidities, and hospitalization outcomes associated with NAFLD in patients with CD. Comparison between groups was performed by Mann-Whitney test for continuous variables and Chi-square test for categorical variables. We performed a binary logistic regression analysis for predictors of NAFLD among patients with CD. Results We extracted 215,049 index hospital discharges with CD; 2.4% had NAFLD. CD patients, with NAFLD, had increased length of stay (4 days; interquartile range (IQR): 2 - 6 vs. 3; IQR: 2 - 6, P < 0.01), and increased median total charges ($32,305.5; IQR: $18,600 - $61,599 vs. $30,782; IQR: $16,847 - $58,667, P < 0.01), compared to CD patients without NAFLD. Non-alcoholic steatohepatitis (NASH) was found to be independently associated with increased mortality (odds ratio (OR): 1.7; 95% confidence interval (CI): 1.1 - 2.6, P = 0.03) and a higher odd for all-cause 30-day non-elective readmission (OR: 1.6: 95% CI: 1.3 - 1.9, P < 0.001). Factors independently associated with NAFLD in patients with CD included portal hypertension (OR: 5.347; 95% CI: 4.604 - 6.211, P < 0.001), vitamin A deficiency (OR: 9.89; 95% CI: 4.49 - 21.76, P < 0.001) and vitamin B12 deficiency (OR: 1.56; 95% CI: 1.098 - 2.209, P = 0.013). Conclusions NAFLD is associated with worse hospitalization outcomes in patients with CD. Study findings suggest the need for early identification and effective management of NAFLD predictors to reduce complications.

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Background There are few studies to evaluate the association between iron deficiency anemia (IDA) and Crohn’s disease (CD). We examined this association in a USA-based cohort of patients with CD. Methods We queried the Nationwide Readmission Databases 2018 using the International Classification of Disease, 10th Revision, and Clinical Modification (ICD-10-CM) codes to identify all adult patients admitted with a diagnosis of CD. Primary outcomes were the prevalence of IDA among patients with CD. Secondary outcomes included inpatient mortality, the length of stay, all-cause 30-day non-elective readmission rate, and total cost of hospitalization. Multivariate regression analysis was performed to study the impact of IDA on inpatient mortality and non-elective readmissions. Results Of the 72,076 patients discharged from an index hospitalization for CD, 8.1% had IDA. CD patients with IDA had increased length of stays in days (4, interquartile range (IQR): 2 - 6 vs. 3, IQR: 2 - 5; P < 0.001), increased median total charges ($35,160, IQR: $19,786 - $64,126 vs. $31,299, IQR: $17,226 - $59,561; P < 0.001), and were more common to require blood transfusion during hospitalization (13.6% vs. 3.4%, P < 0.001) compared to CD patients without IDA, respectively. IDA was independently associated with increased odds of all-cause 30-day non-elective readmission (odds ratio (OR): 1.254, 95% confidence interval (CI): 1.154 - 1.363, P < 0.001) and increased odds of all-cause 90-day non-elective readmission (OR: 1.396, 95% CI: 1.302 - 1.498, P < 0.001). Conclusions In a large nationwide cohort of patients hospitalized for CD, we observed a significant burden of IDA. Additionally, we found a significant association between IDA and worse hospitalization outcomes.

Table 1. ERCP Results ERCP without Rigidizing Overtube ERCP with Rigidizing Overtube Technical Success, n (%) 74/91 (81.0%) 10/11 (90.9%) Clinical Success, n (%) 57/85 (76.2%) 10/10** (100.0%) Adverse Events, n (%) 5/91 (6.0%) 0/11 (0.0%) Post-procedure Fever, n (%) 4/5 (80.0%) -Cholangitis, n (%) 1/5 (20.0%) -**No follow-up data available for 1 case.

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