Coronavirus Disease 2019 (COVID-19) Vaccination Status Prior to Delivery and Administration Among Hospitalized Obstetric Patients.

Background: This chart review aimed to assess the COVID-19 vaccination status of pregnant patients prior to hospitalization for delivery and vaccine administration while hospitalized postpartum.

Methods: This was a retrospective chart review of pregnant patients admitted for delivery at WakeMed Hospital during a six-month period who were offered COVID-19 vaccination immediately following delivery. We analyzed demographic characteristics by vaccination status prior to admission, during hospitalization, and at discharge. ANOVA, chi-squared, and multinomial logistic regression analyses were performed.

Results: Data analysis was performed on 1,476 obstetric patients admitted for delivery, of which 260 (17.6%) were vaccinated prior to admission. Of the 1,216 unvaccinated postpartum patients, 257 (21.1%) received a vaccine dose. Among our population, for every year increase in age, the odds of being vaccinated before admission and receiving vaccination while hospitalized postpartum were higher than those of remaining unvaccinated. The odds of being vaccinated before admission versus remaining unvaccinated at discharge were lower for Black patients compared to White patients. The odds of receiving vaccination during hospitalization were higher for Asian and Hispanic/ Latino patients compared to White patients. The odds of being vaccinated prior to admission versus remaining unvaccinated at discharge were higher for those with private insurance compared to those with public insurance.

Limitations: At the time of our intervention, we did not collect data on COVID-19 infection status of the patient at the time of admission. Additionally, vaccination counseling and administration had not been added to standardized order sets, thus variations in counseling by providers may have impacted patient acceptance.

Conclusions: Compared to patients who remained unvaccinated following discharge, patients vaccinated prior to admission were more likely to be older with private insurance, and less likely to be Black, while patients vaccinated during hospitalization once postpartum were more likely to be older and either Asian or Hispanic/Latino.