COVID-19 hospital prevalence as a risk factor for mortality: an observational study of a multistate cohort of 62 hospitals.

Background: The associated mortality with COVID-19 has improved compared with the early pandemic period. The effect of hospital COVID-19 patient prevalence on COVID-19 mortality has not been well studied.

Methods: We analysed data for adults with confirmed SARS-CoV-2 infection admitted to 62 hospitals within a multistate health system over 12 months.