The RECOVERY (Randomised Evaluation of COVid-19 thERapY) trial found that dexamethasone 6 mg once per day for 10 days reduced deaths by one-third in ventilated patients and by one-fifth in other patients, receiving oxygen therapy. This equates to the prevention of one death in around eight ventilated patients, or one in around 25 patients requiring oxygen.
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Rayman, G., Lumb, A., Kennon, B., Cottrell, C., Nagi, D., Page, E., Voigt, D., Courtney, H., Atkins, H., Platts, J., Higgins, K., Dhatariya, K., Patel, M., Narendran, P., Kar, P., Newland-Jones, P., Stewart, R., Burr, O. & Thomas, S. 2021, 'Dexamethasone therapy in COVID-19 patients: implications and guidance for the management of blood glucose in people with and without diabetes', Diabetic Medicine, 38 (1), article no: e14378 . https://doi.org/10.1111/dme.14378