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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 19 Aug 2020

      Health Nerd Retweeted CNN

      I find studies like this to be such a headache On the one hand, I think the research is valid and important On the other, this headline is SUPER misleading and there are massive caveats not explored in the articlehttps://twitter.com/CNN/status/1295777514976153600 …

      Health Nerd added,

      CNNVerified account @CNN
      Black newborn babies in the US are more likely to survive childbirth if they are cared for by Black doctors, but three times more likely to die when looked after by White doctors, a study finds. https://cnn.it/347NlE1 
      4 replies 58 retweets 335 likes
      Show this thread
    2. Health Nerd‏Verified account @GidMK 19 Aug 2020

      Study is here:https://www.pnas.org/content/early/2020/08/12/1913405117 …

      1 reply 0 retweets 6 likes
      Show this thread
    3. Health Nerd‏Verified account @GidMK 19 Aug 2020

      This was a pretty simple use of a retrospective dataset. The authors took a large database of births, and looked at whether babies died depending on the race of their physicianpic.twitter.com/ouymE9IYVE

      1 reply 1 retweet 10 likes
      Show this thread
    4. Health Nerd‏Verified account @GidMK 19 Aug 2020

      It turns out that, when they plugged their numbers into a corrected OLS model, Black babies had a death rate of 601/100,000 compared to white babies at 290/100,000 But if the physician was Black, this reduced to 419/100,000!pic.twitter.com/EKPM1Woo8t

      2 replies 1 retweet 8 likes
      Show this thread
      Health Nerd‏Verified account @GidMK 19 Aug 2020

      Now, you'll note that this doesn't really match the headline. That's because the headline combined the *unadjusted* results with the *adjusted* results That's problematic!

      5:36 PM - 19 Aug 2020
      • 16 Likes
      • Jonathan Guerrier The Dumpling Arbiter NOT Elle! She/her Josh Erion Propaltganda John MacQuarrie PhD clay
      1 reply 0 retweets 16 likes
        1. New conversation
        2. Health Nerd‏Verified account @GidMK 19 Aug 2020

          It also reports only relative risk differences, but here I think the absolute risk difference is really informative! The rate is going from 0.3% up to 0.6%, which is a bit less terrifying in context

          1 reply 0 retweets 9 likes
          Show this thread
        3. Health Nerd‏Verified account @GidMK 19 Aug 2020

          Delving deeper into the paper tho, there are more caveats Firstly, physician race. The dataset didn't contain this information...so how did the researchers get it?pic.twitter.com/qiQc8ATxvV

          1 reply 0 retweets 16 likes
          Show this thread
        4. Health Nerd‏Verified account @GidMK 19 Aug 2020

          Well, it turns out they used a lengthy but still not ideal process that can be summed up simply: they Googled the physician names and looked at their photos to define race Even with the controls described here, that has issuespic.twitter.com/a57b1RC1fb

          1 reply 0 retweets 16 likes
          Show this thread
        5. Health Nerd‏Verified account @GidMK 19 Aug 2020

          Moving on, there are other worrying limitations here. The dataset contained 4.5 million births, but the primary analysis only uses 1.8 million What's happening here?

          1 reply 0 retweets 8 likes
          Show this thread
        6. Health Nerd‏Verified account @GidMK 19 Aug 2020

          Well, turns out they had ANOTHER primary analysis - Latino babies treated by Latino physicians The results might be a bit of a surprise!pic.twitter.com/IuNHagmqfe

          1 reply 0 retweets 10 likes
          Show this thread
        7. Health Nerd‏Verified account @GidMK 19 Aug 2020

          If you read those regression results, compared to the 0.3% death rate of white babies, Latino babies have a death rate of 0.35% But this INCREASES to 0.4% when the physician is Latino!

          1 reply 0 retweets 14 likes
          Show this thread
        8. Health Nerd‏Verified account @GidMK 19 Aug 2020

          Now, the statistical significance disappears in one of the models there, and I'm not saying that it's likely that Latino physicians are killing babies, but it underscores the difficulty of these analyses Causal attribution is NOT EASY

          1 reply 0 retweets 18 likes
          Show this thread
        9. Health Nerd‏Verified account @GidMK 19 Aug 2020

          For one thing, the analysis didn't adjust for a few confounders that could be important: - maternal age - paternal factors - BMI/blood sugar/blood pressure (they did adjust for ICD-10 codes but these are pretty blunt)

          1 reply 0 retweets 13 likes
          Show this thread
        10. Health Nerd‏Verified account @GidMK 19 Aug 2020

          Now all of this is not to say that this study isn't worthwhile, important, and should prompt further research But I think it's worth noting that the CNN headline at the start of this thread that went mega-viral is misleading at best

          1 reply 1 retweet 18 likes
          Show this thread
        11. Health Nerd‏Verified account @GidMK 19 Aug 2020

          If NOTHING ELSE, this could read "0.3% more likely to die"pic.twitter.com/s8VnrO4Ipq

          1 reply 0 retweets 26 likes
          Show this thread
        12. Health Nerd‏Verified account @GidMK 19 Aug 2020

          Anyway, the point here is not to bash the study, but to point out that you should be skeptical of everything ESPECIALLY if it agrees with you because that's where you're most blind

          0 replies 7 retweets 50 likes
          Show this thread
        13. End of conversation

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