Patient(16) COVID-19(14) patients(10) association(10) Mortality(9) age(8) Factor(8) death(8) Prevalence(8) Inflammatory bowel disease(7) evaluate(7) Infection(7) IBD(7) risk(7) hospital(7) Odds ratio(6) analyzed(6) Analysis(6) reported(6) disease(6) Result(6) Comorbidity(6) 95% confidence interval(6) variety(6) Hospitalization(6) was used(5) 95% CI(5) died(5) variable(5) with COVID-19(5)