Low COVID-19 Vaccination Rates Among Psychiatric Inpatients: Implications for Institutional Settings and Outreach Efforts.

This study sought to determine COVID-19 vaccination rates for individuals with serious mental illness admitted to a large health system in New York State. Vaccination rates among 12,714 patients admitted to psychiatric units and to medical and surgical units were compared between April 6, 2021, and September 30, 2021. Only 40% (N=416 of 1,029) of patients admitted to psychiatric services had at least one COVID-19 vaccination, whereas 64.4% (7,523 of 11,685) of patients admitted to medical and surgical services had at least one vaccination. After adjustment for differences in key demographic and clinical characteristics, patients admitted to psychiatric services had a significantly lower likelihood of vaccination during the study period (risk ratio=0.78, 95% confidence interval=0.73-0.85, p<0.001). Black psychiatric patients had the lowest vaccination rate (28%). Psychiatric patients with acute illness had low COVID-19 vaccination rates. Targeted outreach for COVID-19 vaccination is necessary to reach this population.