[Mortality in schizophrenia: Towards a new health scandal? COVID-19 and schizophrenia]

Patients with schizophrenia represent a vulnerable population who have been understudied in COVID-19 research. We aimed to establish whether health outcomes and care differed between patients with schizophrenia and patients without a diagnosis of severe mental illness. We conducted a population-based cohort study of all patients with identified COVID-19 and respiratory symptoms who were hospitalized in France between February and June 2020. Cases were patients who had a diagnosis of schizophrenia. Controls were patients who did not have a diagnosis of severe mental illness. The outcomes were in-hospital mortality and intensive care unit (ICU) admission. A total of 50,750 patients were included, of whom 823 were schizophrenia patients (1.6%). The schizophrenia patients had an increased in-hospital mortality (25.6% vs. 21.7%; adjusted odds ratio (aOR) 1.30 [95% CI 1.08-1.56], p = 0.0093) and a decreased ICU admission rate (23.7% vs. 28.4%; aOR 0.75 [95% CI 0.62-0.91], p = 0.0062) compared to controls. Significant interactions between schizophrenia and age for mortality and ICU admission were observed (p = 0.0006 and p < 0.0001). Schizophrenia patients between 65 and 80 years had a significantly higher risk of death than controls of the same age (+7.89%). schizophrenia patients younger than 55 years had more ICU admissions (+13.93%) and schizophrenia patients between 65 and 80 years and older than 80 years had less ICU admissions than controls of the same age (-15.44% and -5.93%, respectively). Our findings report the existence of disparities in health and health care between schizophrenia patients and patients without a diagnosis of severe mental illness. These disparities differed according to the age and clinical profile of schizophrenia patients, suggesting the importance of personalized COVID-19 clinical management and health care strategies before, during and after hospitalization for reducing health disparities in this vulnerable population.