Determinants of severity among hospitalised COVID-19 patients: Hospital-based case-control study, India, 2020.

Background: Risk factors for the development of severe COVID-19 disease and death have been widely reported across several studies. Knowledge about the determinants of severe disease and mortality in the Indian context can guide early clinical management.

Methods: We conducted a hospital-based case control study across nine sites in India to identify the determinants of severe and critical COVID-19 disease.