About a third of patients in U.K. hospitals with COVID-19 died from the disease, according to the findings of a study of more than 16,000 people with the virus.

The research, which hasn’t been peer-reviewed and has yet to appear in a scientific journal, is an early insight into the deadliness of the virus in the U.K., which has one of the highest tolls from the pandemic in Europe.

Led by researchers from Edinburgh University, Liverpool University and Imperial College London, the study pulled information from 166 hospitals in England, Wales and Scotland about COVID-19 patients. At the end of the research period, about a third of the patients had died, almost half had been discharged and 17 percent were still receiving care at the hospital.