Oxford University News Release
EMBARGOED UNTIL 16 June 2020, 13:00 (UK Time)
Low-cost dexamethasone reduces death by up to one third in hospitalised patients with severe
respiratory complications of COVID-19
In March 2020, the RECOVERY (Randomised Evaluation of COVid-19 thERapY) trial was established as arandomised clinical trial to test a range of potential treatments for COVID-19, including low-dose
dexamethasone (a steroid treatment). Over 11,500 patients have been enrolled from over 175 NHS hospitals inthe UK.
On 8 June, recruitment to the dexamethasone arm was halted since, in the view of the trial Steering Committee,
sufficient patients had been enrolled to establish whether or not the drug had a meaningful benefit.
A total of 2104 patients were randomised to receive dexamethasone 6 mg once per day (either by mouth or byintravenous injection) for ten days and were compared with 4321 patients randomised to usual care alone.
Among the patients who received usual care alone, 28-day mortality was highest in those who required
ventilation (41%), intermediate in those patients who required oxygen only (25%), and lowest among those who
did not require any respiratory intervention (13%).
Dexamethasone reduced deaths by one-third in ventilated patients (rate ratio 0.65 [95% confidence interval 0.48
to 0.88]; p=0.0003) and by one fifth in other patients receiving oxygen only (0.80 [0.67 to 0.96]; p=0.0021).
There was no benefit among those patients who did not require respiratory support (1.22 [0.86 to 1.75]; p=0.14).
Based on these results, 1 death would be prevented by treatment of around 8 ventilated patients or around 25
patients requiring oxygen alone.
Given the public health importance of these results, we are now working to publish the full details as soon aspossible.
Peter Horby, Professor of Emerging Infectious Diseases in the Nuffield Department of Medicine, University ofOxford, and one of the Chief Investigators for the trial, said: ‘Dexamethasone is the first drug to be shown toimprove survival in COVID-19. This is an extremely welcome result. The survival benefit is clear and large inthose patients who are sick enough to require oxygen treatment, so dexamethasone should now become
standard of care in these patients. Dexamethasone is inexpensive, on the shelf, and can be used immediately tosave lives worldwide.’
Martin Landray, Professor of Medicine and Epidemiology at the Nuffield Department of Population Health,
University of Oxford, one of the Chief Investigators, said: ‘Since the appearance of COVID-19 six months ago,the search has been on for treatments that can improve survival, particularly in the sickest patients. These
preliminary results from the RECOVERY trial are very clear – dexamethasone reduces the risk of death among
patients with severe respiratory complications. COVID-19 is a global disease – it is fantastic that the firsttreatment demonstrated to reduce mortality is one that is instantly available and affordable worldwide.’
The UK Government’s Chief Scientific Adviser, Sir Patrick Vallance, said: ‘This is tremendous news today fromthe Recovery trial showing that dexamethasone is the first drug to reduce mortality from COVID-19. It isparticularly exciting as this is an inexpensive widely available medicine.
‘This is a ground-breaking development in our fight against the disease, and the speed at which researchers
have progressed finding an effective treatment is truly remarkable. It shows the importance of doing high quality
clinical trials and basing decisions on the results of those trials.’

ENDS

Notes to editors:
For interview requests, please contact: Genevieve Juillet, Media Relations Manager (Research and Innovation),
University of Oxford, gen.juillet@admin.ox.ac.uk.
Full details of the study protocol and related materials are available at www.recoverytrial.net.
A range of potential treatments have been suggested for COVID-19 but it has been unclear whether any of themwill turn out to be more effective in improving survival than the usual standard of hospital care which all patients
will receive.
About the RECOVERY trial
The RECOVERY trial is a large, randomised controlled trial of possible treatments for patients admitted tohospital with COVID-19. Over 11,500 patients have been randomised to the following treatment arms, or no
additional treatment:
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Lopinavir-Ritonavir (commonly used to treat HIV)
Low-dose Dexamethasone (a type of steroid, which typically used to reduce inflammation)
Hydroxychloroquine (which has now been stopped due to lack of efficacy)Azithromycin (a commonly used antibiotic)
Tocilizumab (an anti-inflammatory treatment given by injection)
Convalescent plasma (collected from donors who have recovered from COVID-19 and contains
antibodies against the SARS-CoV-2 virus).

Overall dexamethasone reduced the 28-day mortality rate by 17% (0.83 [0.74 to 0.92]; P=0.0007) with a highly
significant trend showing greatest benefit among those patients requiring ventilation (test for trend p<0.001). But
it is important to recognise that we found no evidence of benefit for patients who did not require oxygen and we
did not study patients outside the hospital setting. Follow-up is complete for over 94% of participants.
The RECOVERY trial is conducted by the registered clinical trials units with the Nuffield Department ofPopulation Health in partnership with the Nuffield Department of Medicine. The trial is supported by a grant to
the University of Oxford from UK Research and Innovation/National Institute for Health Research (NIHR) and bycore funding provided by NIHR Oxford Biomedical Research Centre, Wellcome, the Bill and Melinda Gates
Foundation, the Department for International Development, Health Data Research UK, the Medical ResearchCouncil Population Health Research Unit, and NIHR Clinical Trials Unit Support Funding.
The RECOVERY trial involves many thousands of doctors, nurses, pharmacists, and research administrators atover 175 hospitals across the whole of the UK, supported by staff at the NIHR Clinical Research Network, NHS
DigiTrials, Public Health England, Public Health Scotland, Department of Health & Social Care, and the NHS inEngland, Scotland, Wales and Northern Ireland.
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