Medical events in SARS-Cov-2 infected psychiatric inpatients with and without pre-existing co-morbid medical conditions

SARS-CoV-2 (COVID-19) infection can be associated with significant medical complications. This risk could be even higher in psychiatric patients due to an increased risk of medical co-morbidity. In addition, psychiatric patients are also vulnerable to acquiring SARS-CoV2 infection due to homelessness, living in crowded areas, and poor adherence to recommended preventive measures. This retrospective study aims to compare two groups of patients, namely COVID-19 positive inpatient psychiatric patients with and without preexisting medical comorbidity on specific clinical and socio-demographic features and more importantly how many patients in the two groups subsequently developed medical complications. All COVID-19 positive psychiatric patients who were admitted to acute psychiatric inpatient units over a one-year period during the peri-pandemic phase were included for this study. Data was collected from the electronic medical records of 174 patients admitted to the inpatient psychiatric facility between January and December 2020. Among the COVID-19 positive patients, twenty individuals out of eighty-nine in the WC (with pre-existing medical comorbidity) group and two individuals out of eighty-five in the WOC (without pre-existing medical comorbidity) group developed COVID-related pneumonia. Ten WC patients and two WOC patients required supplemental oxygen, while only one patient in the WC group developed critical illness and required ventilatory support. The WC group had longer stay in both psychiatric and medical units compared to the WOC group. Consistent with existing literature that patients with comorbid medical condition are higher risk of COVID-19 complications, this study replicates the finding that in psychiatric inpatients pre-existing comorbid medical conditions create a higher risk of experiencing COVID-19 related medical complications. More interestingly, however that increased risk of developing new medical complications was not significantly different from the published rates observed in the general population which is surprising given how vulnerable psychiatric patients are, both medical, psychiatrically and psychosocially. In fact, in some ways and for reasons as yet unclear, the medical complication rate was slightly better in the WC compared to published data in the general population groups.