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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 11 Jul 2019

      The press release is here, and unsurprisingly I am not a fanhttps://www.sciencedaily.com/releases/2019/07/190710121607.htm …

      1 reply 0 retweets 14 likes
      Show this thread
    2. Health Nerd‏Verified account @GidMK 11 Jul 2019

      The study is pretty simple - the researchers took a very large database of children (1.3 million) and identified every cancer diagnosis in that group 1.3 million children, about 2,000 cases of cancer (childhood cancers are rare)

      1 reply 1 retweet 13 likes
      Show this thread
    3. Health Nerd‏Verified account @GidMK 11 Jul 2019

      They then compared the kids based on the characteristics of their mothers, in particular BMI, to see if that affected their risk of cancerpic.twitter.com/tiQQ5Wn9qz

      1 reply 1 retweet 8 likes
      Show this thread
    4. Health Nerd‏Verified account @GidMK 11 Jul 2019

      They found that there was a very weak relationship between maternal BMI and the risk of childhood cancer (p=0.01), although this risk didn't become statistically significant until mothers were above 40Kg/m^2 BMI

      1 reply 2 retweets 15 likes
      Show this thread
    5. Health Nerd‏Verified account @GidMK 11 Jul 2019

      They also found, in a piece of mind-blowing absurdity, that childhood leukemia was NOT statistically significantly related to maternal BMI (p-value highlighted)pic.twitter.com/r1r8sFEd5a

      3 replies 1 retweet 15 likes
      Show this thread
    6. Sir Panda (Zad Rafi)‏ @dailyzad 11 Jul 2019
      Replying to @GidMK

      Minus the absolute/relative risks aside, why do you think statistical significance/lack of it matters in a study with no randomization? Perfect RCT + high power for the stat test, I might conclude that sig diff is because of exposure, but what about here 1/2

      1 reply 0 retweets 1 like
    7. Sir Panda (Zad Rafi)‏ @dailyzad 11 Jul 2019
      Replying to @dailyzad @GidMK

      where other model assumptions are violated? like the assumed distributional form/random mechanism. What exactly would low P or high P mean here? 2/2

      1 reply 0 retweets 0 likes
    8. Health Nerd‏Verified account @GidMK 11 Jul 2019
      Replying to @dailyzad

      I reckon if you're going to use statistical significance based on p-values as your cutoff, you should report when your values are above them even if the whole model is a bit silly in the situation

      1 reply 0 retweets 0 likes
    9. Health Nerd‏Verified account @GidMK 11 Jul 2019
      Replying to @GidMK @dailyzad

      The really honest results would've been that there was an increased risk observed, but since there's no solid plausible mechanism and the CIs all crossed 1 except for very high BMIs, it's hard to make a solid conclusion based on this research

      1 reply 0 retweets 0 likes
    10. Sir Panda (Zad Rafi)‏ @dailyzad 11 Jul 2019
      Replying to @GidMK

      If increase in risk is small and could easily be explained away by confounding, I think that may be reason to be skeptical, but the CIs crossing 1 just indicates nonsignificance, not lack of effect. Peto, 1988 all CIs cross 1, but pooled, there's an effect, studies were imprecisepic.twitter.com/sXoPiw7Gb4

      1 reply 0 retweets 1 like
      Health Nerd‏Verified account @GidMK 11 Jul 2019
      Replying to @dailyzad

      Right, but at the very least they should've addressed the fact that their results were not inconsistent with obesity being preventive of cancer up until BMI got above 40

      9:39 PM - 11 Jul 2019
      0 replies 0 retweets 0 likes

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