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GidMK's profile
Health Nerd
Health Nerd
Health Nerd
Verified account
@GidMK

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Health NerdVerified account

@GidMK

Epidemiologist. Writer (Guardian, Observer etc). "Well known research trouble-maker". PhDing at @UoW Host of @senscipod Email gidmk.healthnerd@gmail.com he/him

Sydney, New South Wales
theguardian.com/profile/gideon…
Joined November 2015

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    1. Health Nerd‏Verified account @GidMK 18 Nov 2020

      So, The Big Mask study has been published, and I thought rather than expound on what the results DID show (everyone's doing that), I might point out a few things that they DIDN'T show 1/npic.twitter.com/zG4jtXQVVq

      31 replies 257 retweets 683 likes
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    2. Health Nerd‏Verified account @GidMK 18 Nov 2020

      2/n Study is here, as ever have a read. A very simple, nicely done RCT comparing the advice to wear masks with no such advice in Denmark:https://www.acpjournals.org/doi/10.7326/M20-6817 …

      2 replies 3 retweets 66 likes
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    3. Health Nerd‏Verified account @GidMK 18 Nov 2020

      3/n So, first point. This study says NOTHING about whether mask mandates are good public health policy Indeed, the authors themselves point this out in the discussionpic.twitter.com/jSa5O6VZXe

      3 replies 11 retweets 100 likes
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    4. Health Nerd‏Verified account @GidMK 18 Nov 2020

      4/n In fact, we already knew that telling people to wear masks (and providing them with masks) is a relatively ineffective way to stop them from getting a respiratory disease. Universal masking is more complex than that

      1 reply 5 retweets 93 likes
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    5. Health Nerd‏Verified account @GidMK 18 Nov 2020

      5/n The study DOESN'T show that masks are ineffective at preventing infection for the person wearing them I know it sounds weird, but it's true!

      2 replies 10 retweets 117 likes
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    6. Health Nerd‏Verified account @GidMK 18 Nov 2020

      6/n See, the authors powered their study (i.e. recruited participants) assuming that masks decreased your risk of infection by 50%, which is quite a lot!pic.twitter.com/WcBowCIJ7u

      2 replies 4 retweets 94 likes
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    7. Health Nerd‏Verified account @GidMK 18 Nov 2020

      7/n What the study actually shows is that advising someone to wear a mask doesn't reduce their risk of COVID-19 by ~50% or more~, but the results don't exclude smaller benefits

      10 replies 12 retweets 129 likes
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    8. Klaus K‏ @KlausKblog 20 Nov 2020
      Replying to @GidMK

      Yes it did exclude smaller benefits. The conclusion is clear. "A recommendation to wear a surgical mask when outside the home among others did not reduce, at conventional levels of statistical significance, incident SARS-CoV-2 infection compared with no mask recommendation."

      1 reply 0 retweets 0 likes
      Health Nerd‏Verified account @GidMK 20 Nov 2020
      Replying to @KlausKblog

      Have a read up on statistical power, check their sample size calculations, and get back to me

      7:37 PM - 20 Nov 2020
      2 replies 0 retweets 0 likes
        1. New conversation
        2. Klaus K‏ @KlausKblog 20 Nov 2020
          Replying to @GidMK

          No, you do that. You are fact-checking the study, I am fact-checking you. 🤗

          1 reply 0 retweets 0 likes
        3. Health Nerd‏Verified account @GidMK 20 Nov 2020
          Replying to @KlausKblog

          Lol, well you're wrong and have misunderstood it so like I said, have a read of sample sizes, power calculations, and get back to me 🤗

          0 replies 0 retweets 0 likes
        4. End of conversation
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