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GidMK's profile
Health Nerd
Health Nerd
Health Nerd
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@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 14 Jun 2020

      3/n On top of these, I wanted to note a couple of other things that make this study obviously wrong in terms of design and conclusions

      1 reply 1 retweet 2 likes
      Show this thread
    2. Health Nerd‏Verified account @GidMK 14 Jun 2020

      4/n The study is here https://www.pnas.org/content/early/2020/06/10/2009637117 … Basically, the authors compared the rate of infections before/after mask interventions in three places to a linear trend extrapolation, and found that after masks there were fewer infections than before

      1 reply 1 retweet 1 like
      Show this thread
    3. Health Nerd‏Verified account @GidMK 14 Jun 2020

      5/n They also plotted linear regressions of pre-mask and post-mask interventions, showing a linear trend upwards and then downwards Thus, masks caused the change!pic.twitter.com/FsshjCPfTH

      1 reply 1 retweet 3 likes
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    4. Health Nerd‏Verified account @GidMK 14 Jun 2020

      6/n Now, this is at face value implausible. The authors have picked out masks as an intervention, but the reality here is that there was NO SINGLE INTERVENTION that you could easily point to at any moment in time

      1 reply 2 retweets 9 likes
      Show this thread
    5. Health Nerd‏Verified account @GidMK 14 Jun 2020

      7/n In New York, in the same week that the governor signed a mask law, there were at least 2 other laws implemented regarding COVID-19, and many changes in policy as well It's not as simple as a single intervention!

      1 reply 1 retweet 2 likes
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    6. Health Nerd‏Verified account @GidMK 14 Jun 2020

      8/n Moreover, the authors have cherry-picked 3 specific places that appear to support their argument This is obviously bad science - what about the rest of the world?

      1 reply 1 retweet 3 likes
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    7. Health Nerd‏Verified account @GidMK 14 Jun 2020

      9/n What about Australia, where we've never had mask laws (and most people don't wear masks)?pic.twitter.com/CfulD3MWkq

      3 replies 1 retweet 4 likes
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    8. Health Nerd‏Verified account @GidMK 14 Jun 2020

      10/n Or South Korea, where masks have always been a major part of the pandemic response? Both of these are direct counter-examples to the arguments made in the piece, but are excludedpic.twitter.com/ESNAGvHb4C

      3 replies 1 retweet 2 likes
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    9. Health Nerd‏Verified account @GidMK 14 Jun 2020

      11/n There are dozens more such examples. While in some countries masking was temporally related to declines in case numbers, this is by no means true of every place in the world

      1 reply 1 retweet 1 like
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    10. Health Nerd‏Verified account @GidMK 14 Jun 2020

      12/n So the authors have cherry-picked their interventions, cherry-picked their locations, and as others have identified done quite a few other questionable things as well It is ~very~ frustrating to see

      1 reply 2 retweets 4 likes
      Show this thread
      Health Nerd‏Verified account @GidMK 14 Jun 2020

      13/n Especially since I am not against masks! The point here is not that masks do or do not work, it is that this paper provides absolutely no evidence either way and is largely useless at determining cause and effect

      4:15 PM - 14 Jun 2020
      • 4 Retweets
      • 25 Likes
      • Kristen Allen theunretired yslexdia Dr Naomi Harvey (PhD not MD) #GetVaccinated L David D. Pseudo Science Paul Gilbert Maurice Politis
      3 replies 4 retweets 25 likes
        1. This Tweet is unavailable.
        2. Jon Huang, MPH, PhD | BLM |  🙏🏽‏ @jon_y_huang 14 Jun 2020
          Replying to @claudedwalker @GidMK

          I think the end goal for everyone is controlling the epidemic not solely making everyone wear masks. This paper falsely sells the idea that masks in lieu of everything else will control the epidemic using bad data. That is dangerous.

          0 replies 0 retweets 4 likes
        3. End of conversation
        1. New conversation
        2. Jon Huang, MPH, PhD | BLM |  🙏🏽‏ @jon_y_huang 14 Jun 2020
          Replying to @GidMK

          The most egregious thing is even a passing understanding of epidemics or statistical approaches to estimating effects would have shown a) better ways to analyze this and b) they didn't have the necessary data! Completely ignorant blog masquerading as a paper.

          2 replies 0 retweets 3 likes
        3. Jeremy Howard‏ @jeremyphoward 14 Jun 2020
          Replying to @jon_y_huang @GidMK

          There is a paper that does a much more thorough job with much more data, but has been largely ignored thus farhttps://www.medrxiv.org/content/10.1101/2020.05.22.20109231v2 …

          2 replies 1 retweet 2 likes
        4. Show replies
        1. 猫好きな人‏ @ValoisDuBins 14 Jun 2020
          Replying to @GidMK

          There is a weird amount of tribalism and bad claims made in support of community masks-for-all policies. Like many, I would guess they might help, but I’ve seen not only bad studies, but very bad interpretations of normal studies too. It’s genuinely odd.

          0 replies 0 retweets 1 like
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