[Prevalence and risk factors of delirium in COVID-19].

Objective: To assess the frequency and risk factors of delirium in patients hospitalized with COVID-19.

Material And Methods: Four hundred and forty patients admitted to the Infectious Diseases Hospital of the University Clinical Hospital No.3 of Sechenov University were included in the study. The Patient Health Questionnaire (PHQ-9), the Generalized Anxiety Disorder Screening Questionnaire-7 (GAD-7), the Insomnia Severity Index (ISI), the Delirium severity rating scale (DRS-R-98) were administered.

Results: Delirium was detected in 27.8% of patients. Significant risk factors were age (=0.002), severity of respiratory failure (=0.005), concomitant somatic disease (=0.003), and respiratory therapy (<0.001). There was an association between severe anxiety (<0.001) and insomnia (=0.07) observed at admission with the risk of developing delirium during the hospital stay.

Conclusion: The study reveals a high prevalence of delirium in patients with COVID-19. In order to prevent delirium and/or reduce the risk, early diagnosis and identification of preclinical forms are of particular importance.