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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 9 Oct 2019

      First up, we have what's known as statistical heterogeneity Basically, this means that the studies that the researchers found and analyzed together were very different, making the analysis less reliablepic.twitter.com/hJwm6VVoLV

      1 reply 0 retweets 5 likes
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    2. Health Nerd‏Verified account @GidMK 9 Oct 2019

      How different were these studies? Well, a commonly-used measure to assess heterogeneity is the I^2 statistic. A value between 0-50% is considered "low" This study found I^2 between 96-98% (except for one subgroup analysis)pic.twitter.com/h078Q4zngn

      2 replies 0 retweets 4 likes
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    3. Health Nerd‏Verified account @GidMK 9 Oct 2019

      This makes sense, because the studies that they found were VERY DIFFERENT For example, one study looked at ~everyone in Sweden~, while another looked only at elderly women with hypertensionpic.twitter.com/ar19xXbniu

      1 reply 0 retweets 6 likes
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    4. Health Nerd‏Verified account @GidMK 9 Oct 2019

      But that wasn't the biggest issue The biggest issue was that this piece of research didn't look at confounding factors At allpic.twitter.com/z7jrTWYspY

      1 reply 1 retweet 8 likes
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    5. Health Nerd‏Verified account @GidMK 9 Oct 2019

      Now, I bang on about observational research and the problems with causality, but that's usually in well-controlled studies where residual confounding might potentially be an issue

      1 reply 0 retweets 3 likes
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    6. Health Nerd‏Verified account @GidMK 9 Oct 2019

      Here, we have a piece of research that didn't control for any factors other than dog ownership ~at all~ It's not hard to see how this might make the results a bit problematicpic.twitter.com/9ZY2Jp6csH

      1 reply 1 retweet 6 likes
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    7. Health Nerd‏Verified account @GidMK 9 Oct 2019

      Essentially, it means that this study just looked at a simple association Dog owners die a bit less than non-owners That's it!

      2 replies 1 retweet 6 likes
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    8. Health Nerd‏Verified account @GidMK 9 Oct 2019

      Dog owners are often very different to non-owners in important ways From the Swedish study I mentioned above, owners were more educated, married more often, more likely to have kids, etcpic.twitter.com/LmYkqrlFuE

      1 reply 3 retweets 7 likes
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    9. Health Nerd‏Verified account @GidMK 9 Oct 2019

      What this means is that there are literally hundreds of explanations for dog owners being more healthy than non-owners that have nothing to do with the dogs Funnily enough, that's something that the authors noted in the studypic.twitter.com/BWzTi99vJs

      1 reply 1 retweet 5 likes
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    10. Health Nerd‏Verified account @GidMK 9 Oct 2019

      Basically, healthy people might be more likely to buy dogs Thus, dog owners die less Association rather than causation

      2 replies 3 retweets 14 likes
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      Health Nerd‏Verified account @GidMK 9 Oct 2019

      And the mechanisms of dogs saving our lives are a bit flimsy. Some minor reductions in blood pressure =/= lifesaving

      2:57 PM - 9 Oct 2019
      • 3 Likes
      • JW "Good news is good, bad news is bad" Oliver Christina Carolyn
      2 replies 0 retweets 3 likes
        1. Health Nerd‏Verified account @GidMK 9 Oct 2019

          So...puppies probably aren't saving our lives They're still great tho, you should definitely get one Adopt, don't shop!pic.twitter.com/n0a6UOHvZf

          1 reply 2 retweets 9 likes
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        1. Eric O'Grey‏ @Eric_OGrey 9 Oct 2019
          Replying to @GidMK

          I stopped going outside and hadn’t been on a date in 15 years. My weight was 340 and I was on 15 meds. My doctor told me he was out of options and suggested that I buy a cemetery plot. Then I adopted a dog and a vegan diet and my life changed forever. A dog saved my life.pic.twitter.com/y1NlwVH3Gw

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