In this observational study involving patients with Covid-19 who had been admitted to the hospital, hydroxychloroquine administration was not associated with either a greatly lowered or an increased risk of the composite end point of intubation or death.
Funny, it seems they left out a very important part of the treatment. Zinc. hydroxychloroquine is supposed to be administered with zinc to be effective, also usually with a z-pak. Weird they didn't once mention zinc in your linked paper. Of course creating studies to get a desired outcome is not new, the field is rife with fraud. This has been known about hydroxychloroquine for a very long time when treating other coronaviruses....