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