On Fri, Aug 7, 2020 at 4:20 PM Jason Resch <[email protected]> wrote:

*> So infection rates in the control group were 14.3% and in the group
> receiving HCQ were 11.8%.  That's an absolute risk reduction of
> (14.3-11.8)/14.3 = 17.5%.*


And that is a rate that is not statistically significant, that is to say it
was most likely a random artifact produced by the small sample size. And
that is why every scientist who knows something about statistics was not
hailing this is a major milestone in the fight against COVID-19 but instead
was telling people to stop wasting their time talking about
hydroxychloroquine and use that time to look for something that might
actually work. Of course there are still plenty of people screaming about
the wonders of hydroxychloroquine, but none of them are scientists who know
something about the subtleties of statistics; they are instead Internet
pundits with 20 minutes of study of the science of epidemiology under their
belt, fascist politicians desperate to win reelection, and quack doctors
who babble about demon sperm and vaccines made from space alien DNA.

Yes some early small scale tests hinted that hydroxychloroquine might be
useful but the most important of them was retracted, to the great
embarrassment of the journal involved, because the data used in it was
suspect:

Retraction—Hydroxychloroquine or chloroquine with or without a macrolide
for treatment of COVID-19:
<https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(20)31324-6/fulltext>

And later much larger and much better conducted trials  indicated
hydroxychloroquine conferred no benefit in the treatment of COVID-19 and if
anything was harmful:

Three big studies dim hopes that hydroxychloroquine can treat or prevent
COVID-19
<https://www.sciencemag.org/news/2020/06/three-big-studies-dim-hopes-hydroxychloroquine-can-treat-or-prevent-covid-19>

John K Clark

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