A new study to be presented at this year's European Congress of Clinical Microbiology & Infectious Diseases (ECCMID 2023, Copenhagen April 15-18), and published in The Lancet, shows that compared with standard care that included low-dose corticosteroid use, treating hypoxic COVID-19 patients needing only oxygen therapy or no breathing support with higher-dose corticosteroids is associated with a 60% increased risk of death.

This study, conducted by the RECOVERY Collaborative Group and led by Prof Sir Peter Horby and Prof Sir Martin Landray (both of the University of Oxford, UK), had already identified that low-dose corticosteroids reduce mortality for patients with COVID-19 requiring oxygen or ventilatory support. Since May 2021, the RECOVERY trial has evaluated the use of a higher dose of corticosteroids in this patient group. However, in May 2022, the independent Data Monitoring Committee advised that this treatment assessment be stopped for those patients receiving oxygen alone or no breathing support. The trial continues to study the effects of high-dose corticosteroids for those needing non-invasive or invasive mechanical ventilation.

Eligible and consenting adult patients with COVID-19 and clinical evidence of hypoxia (i.e., receiving oxygen or with oxygen saturation <92% in normal room air) were randomly allocated (1:1) to either usual care with higher-dose corticosteroids (dexamethasone 20 mg once daily for 5 days followed by 10 mg dexamethasone once daily for 5 days or until discharge if sooner) or usual standard of care alone (which included dexamethasone at the lower 6 mg, once-daily dose for 10 days or until discharge if sooner). The primary outcome was 28-day mortality among all randomised participants.

Between May 25, 2021, and May 13, 2022, 1,272 patients with COVID-19 and hypoxia receiving no oxygen (8 [1%]) or simple oxygen only (1,264 [99%]) were randomly allocated to receive usual care plus higher dose corticosteroids (659 patients) versus usual care alone (613 patients, of whom 87% received low-dose corticosteroids during the follow-up period). Of those randomly assigned, 745 (59%) were in Asia, 512 (40%) in the UK, and 15 (1%) in Africa. Of the patients, 248 (19%) had diabetes and 769 (60%) were male. Overall, 123 (19%) of 659 patients allocated to higher-dose corticosteroids versus 75 (12%) of 613 patients allocated to usual care died within 28 days—meaning a 60% increased risk of mortality for the higher dose corticosteroid group.

There was also an excess of pneumonia reported to be due to non-COVID infection in the higher-dose corticosteroid group: 64 cases (10%) vs. 37 cases (6%); and an increase in hyperglycemia (high blood sugar episode) requiring an increased insulin dose: 142 [22%] vs. 87 [14%].

The authors conclude, "Among hospitalized patients with COVID-19 who require oxygen or ventilatory support, low-dose corticosteroids reduce the risk of death. However, among patients requiring simple oxygen only, higher doses of corticosteroids increase the risk of death compared with low-dose corticosteroids. It remains unclear whether using a higher dose of corticosteroids is beneficial among patients requiring non-invasive or invasive ventilation—the RECOVERY trial continues to study this."

--European Society of Clinical Microbiology and Infectious Diseases