ABSTRACT
OBJECTIVE: The immediate postpartum period, during delivery hospitalization, represents a unique opportunity to offer coronavirus disease 2019 (COVID-19) vaccination to those who did not previously receive it. In this study, we evaluated patient characteristics associated with acceptance of vaccination in this group. METHODS: This retrospective cohort study evaluated all unvaccinated patients who were offered postpartum COVID-19 vaccination during delivery hospitalization between May 2021 and September 2021 at seven hospitals within a large integrated health system in New York. During the study period, each hospitalized, unvaccinated obstetrical patient was offered the vaccine prior to discharge. Patients with positive SARS-CoV-2 PCR testing during hospitalization were excluded. Medical records were reviewed to obtain sociodemographic characteristics and to confirm administration of COVID-19 vaccination. Multiple logistic regression was performed to model the probability of receiving postpartum vaccination. RESULTS: A total of 8,281 unvaccinated postpartum patients were included for analysis and 412 (5%) received a COVID-19 vaccine before hospital discharge. Patients who received the vaccine were more likely to be older, have private insurance, decline to answer questions about religious affiliation, and deliver in the final two months of the study period. Likelihood of receiving postpartum vaccination was not affected by race-ethnicity, preferred language, marital status, parity, body mass index, or neighborhood socioeconomic conditions. Patients who declined vaccination were more likely to have positive SARS-CoV-2 antibody testing at delivery compared to those who received vaccination (49 vs. 29%; p < .001). CONCLUSION: Only 5% of unvaccinated postpartum patients received a COVID-19 vaccine before hospital discharge. It is concerning that patients with public health insurance were less likely to receive vaccination. This may be due to variation in vaccine counseling or other unmeasured factors. Despite the low acceptance rate in our study population, COVID-19 vaccination should be offered in a variety of clinical settings to maximize opportunities for administration.