Uptake Rates of Three COVID-19 Vaccine Doses and Risk Factors for Incomplete Vaccination Among Patients With Inflammatory Bowel Disease Residing in Wisconsin: A Single-Center Cohort.

Patients with inflammatory bowel disease on systemic corticosteroids may be at higher risk of adverse outcomes of COVID-19 infection, and vaccination is an essential preventive measure. Uptake of the original 2-dose COVID-19 messenger RNA (mRNA) primary vaccine series was previously high among patients with inflammatory bowel disease, while uptake of subsequent doses based on interval recommendations made by the Advisory Committee on Immunization Practice remains unknown. Herein, we evaluated uptake of 3 COVID-19 mRNA vaccine doses among patients with inflammatory bowel disease. A total of 1012 patients were identified; 728 (71.9%) patients received 3 COVID-19 vaccine doses. Multivariable logistic regression revealed that younger age (odds ratio [OR] 1.02; 95% CI, 1.01 - 1.03; P = 0.001), rural status (OR 3.44; 95% CI, 2.17 - 5.56; Of 1362 patients, 83.3% completed a COVID-19 vaccination series. Younger patients had increased odds of not completing a COVID-19 vaccination series (mean [SD] 46.7 [14.7] vs 54.3 [15.8]; OR 1.03; 95% CI, 1.02-1.04; Receipt of 3 COVID-19 mRNA vaccine doses is high overall among patients with inflammatory bowel disease. Younger age, underrepresented race/ethnicity, rural status, and lack of influenza vaccination are associated with incomplete COVID-19 vaccination.

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