https://www.bbc.co.uk/news/health-55574662 This
Post# of 148319
This study shows the average mortality in the severe critical population is 34%. If 87 deaths in our trial is the final and accurate number (it won't be), then our trial in total had 22.3%. (using 22% for simplicity)
Due to the 2:1 ratio that would out the Leronlimab arm at 16%. (Sum of 16,16,34 divided by 3 equals 22)
At 16% we reduced mortality by over 50%.
Now if some of the deaths in either arm were after 28 days the numbers may skew. And if course there are 5 days remaining for patient 390.