Patient(16) COVID-19(14) patients(10) association(10) Mortality(9) death(8) Prevalence(8) age(8) Factor(8) hospital(7) evaluate(7) Inflammatory bowel disease(7) Infection(7) IBD(7) risk(7) 95% confidence interval(6) Result(6) Comorbidity(6) variety(6) Hospitalization(6) Odds ratio(6) Analysis(6) analyzed(6) reported(6) disease(6) addition(5) severe COVID-19(5) Pneumonia(5) Impact(5) therapy(5)