Skip to content
By using Twitter’s services you agree to our Cookies Use. We and our partners operate globally and use cookies, including for analytics, personalisation, and ads.
  • Home Home Home, current page.
  • About

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @
  • Language: English
    • Bahasa Indonesia
    • Bahasa Melayu
    • Català
    • Čeština
    • Dansk
    • Deutsch
    • English UK
    • Español
    • Filipino
    • Français
    • Hrvatski
    • Italiano
    • Magyar
    • Nederlands
    • Norsk
    • Polski
    • Português
    • Română
    • Slovenčina
    • Suomi
    • Svenska
    • Tiếng Việt
    • Türkçe
    • Ελληνικά
    • Български език
    • Русский
    • Српски
    • Українська мова
    • עִבְרִית
    • العربية
    • فارسی
    • मराठी
    • हिन्दी
    • বাংলা
    • ગુજરાતી
    • தமிழ்
    • ಕನ್ನಡ
    • ภาษาไทย
    • 한국어
    • 日本語
    • 简体中文
    • 繁體中文
  • Have an account? Log in
    Have an account?
    · Forgot password?

    New to Twitter?
    Sign up
GidMK's profile
Health Nerd
Health Nerd
Health Nerd
Verified account
@GidMK

Tweets

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

Tweets

  • © 2021 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • Cookies
  • Ads info
Dismiss
Previous
Next

Go to a person's profile

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @

Promote this Tweet

Block

  • Tweet with a location

    You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more

    Your lists

    Create a new list


    Under 100 characters, optional

    Privacy

    Copy link to Tweet

    Embed this Tweet

    Embed this Video

    Add this Tweet to your website by copying the code below. Learn more

    Add this video to your website by copying the code below. Learn more

    Hmm, there was a problem reaching the server.

    By embedding Twitter content in your website or app, you are agreeing to the Twitter Developer Agreement and Developer Policy.

    Preview

    Why you're seeing this ad

    Log in to Twitter

    · Forgot password?
    Don't have an account? Sign up »

    Sign up for Twitter

    Not on Twitter? Sign up, tune into the things you care about, and get updates as they happen.

    Sign up
    Have an account? Log in »

    Two-way (sending and receiving) short codes:

    Country Code For customers of
    United States 40404 (any)
    Canada 21212 (any)
    United Kingdom 86444 Vodafone, Orange, 3, O2
    Brazil 40404 Nextel, TIM
    Haiti 40404 Digicel, Voila
    Ireland 51210 Vodafone, O2
    India 53000 Bharti Airtel, Videocon, Reliance
    Indonesia 89887 AXIS, 3, Telkomsel, Indosat, XL Axiata
    Italy 4880804 Wind
    3424486444 Vodafone
    » See SMS short codes for other countries

    Confirmation

     

    Welcome home!

    This timeline is where you’ll spend most of your time, getting instant updates about what matters to you.

    Tweets not working for you?

    Hover over the profile pic and click the Following button to unfollow any account.

    Say a lot with a little

    When you see a Tweet you love, tap the heart — it lets the person who wrote it know you shared the love.

    Spread the word

    The fastest way to share someone else’s Tweet with your followers is with a Retweet. Tap the icon to send it instantly.

    Join the conversation

    Add your thoughts about any Tweet with a Reply. Find a topic you’re passionate about, and jump right in.

    Learn the latest

    Get instant insight into what people are talking about now.

    Get more of what you love

    Follow more accounts to get instant updates about topics you care about.

    Find what's happening

    See the latest conversations about any topic instantly.

    Never miss a Moment

    Catch up instantly on the best stories happening as they unfold.

    1. Health Nerd‏Verified account @GidMK Apr 11

      Fascinating study demonstrating the issues with selection bias in seroprevalence estimates Using a selected sample of participants, the estimated prevalence of past COVID-19 infection doubled (!) https://www.nature.com/articles/s41467-021-22351-5#Sec2 …pic.twitter.com/pqN5l1SA41

      5 replies 32 retweets 127 likes
      Show this thread
      Health Nerd‏Verified account @GidMK Apr 11

      The study is really interesting. They used an existing representative sample of people aged >30 to estimate the population prevalence of antibodies to SARS-CoV-2pic.twitter.com/lKl4qrSkdO

      4:40 PM - 11 Apr 2021
      • 8 Likes
      • Ivan B. Antonio Golfari Mathematiker plädiert für Ruhe und Rationalität Ryan Hisner the sailing science shill ⛵️ JP Emily Rugel Mike Dee
      1 reply 0 retweets 8 likes
        1. New conversation
        2. Health Nerd‏Verified account @GidMK Apr 11

          They then added a second group. These were people who had not previously signed up to the existing cohort, but were eligiblepic.twitter.com/1YvLwHtX5H

          1 reply 0 retweets 8 likes
          Show this thread
        3. Health Nerd‏Verified account @GidMK Apr 11

          In Group 1, 0.97% of people had antibodies to the virus In Group 2, this doubled to 1.94%pic.twitter.com/ov81bnbRkG

          1 reply 0 retweets 9 likes
          Show this thread
        4. Health Nerd‏Verified account @GidMK Apr 11

          Even more interesting, this difference did not disappear even when adjusting for age, sex, or reported past symptoms of COVID-19 The only major difference between the groups? Thinking you'd been exposed to COVID-19 in the pastpic.twitter.com/vChuKScITB

          1 reply 3 retweets 20 likes
          Show this thread
        5. Health Nerd‏Verified account @GidMK Apr 11

          Two take-homes: 1. Selection bias is a big problem 2. Adjusting for demographics and symptoms may not be adequate to correct for this bias

          2 replies 3 retweets 23 likes
          Show this thread
        6. Health Nerd‏Verified account @GidMK Apr 11

          What this means is that if you recruit people to a seroprevalence study in a biased way (say, by telling them that they can go back to normal life if they get a positive result), you might end up with a massively inflated estimate

          2 replies 0 retweets 20 likes
          Show this thread
        7. Health Nerd‏Verified account @GidMK Apr 11

          This is important in IFR calculations If we used the representative sample, we get an IFR of ~0.8% Using the biased sample, it's halved to ~0.4% Big difference!

          1 reply 9 retweets 40 likes
          Show this thread
        8. Health Nerd‏Verified account @GidMK Apr 11

          Thanks @MikeDeeeeeee for pointing out the research

          5 replies 0 retweets 13 likes
          Show this thread
        9. End of conversation

      Loading seems to be taking a while.

      Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

        Promoted Tweet

        false

        • © 2021 Twitter
        • About
        • Help Center
        • Terms
        • Privacy policy
        • Cookies
        • Ads info