While I don't particularly doubt the conclusion... "The study analyzed 585 patients in the intensive care unit (ICU) at Northwestern Memorial Hospital with sev

While I don't particularly doubt the conclusion... "The study analyzed 585 patients in the intensive care unit (ICU) at Northwestern Memorial Hospital with severe pneumonia and respiratory failure, 190 of whom had COVID-19. The scientists developed a new machine learning approach called CarpeDiem, which groups similar ICU patient-days into clinical states based on electronic health record data." Wait, one hospital? Less than 1000 patients, and less then 200 who had covid-19? What if that hospital was located in an area with older demographics? Or younger? Or different in some other medically significant way than the general population? Also, what if the doctors or the policy for treating covid-19 was different than at many hospitals? There was no generally accepted method at first, and when things like "lay them on their chest instead of their back" were discovered, or "ventilators don't really seem to help much", I'm sure they got adopted at different hospitals at different times. I don't know that I would conclude much of anything from a study of this size.