PUBLIC HEALTH OFFICIAL: Testing drives our COVID policies. ME: PCR tests over-count positives by up to 10X though. PHO: Case counts are too high. ME: OK, but... PHO: Case counts are too high. ME: But if tests are flawed... PHO: Case counts are too high.
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Replying to @tlowdon
True false positives are rare in PCR tests approx. 1 in 1,000.https://medium.com/@gidmk/most-positive-coronavirus-tests-are-true-positives-60c95fe54fec …
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Replying to @Loretta_Torrago @tlowdon
Your definitions of sensitivity and specificity appear to be incorrect. Denominators Matter - sensitivity is a/a+c not a/c. Hope this helpspic.twitter.com/ouOxVDyqkl
2 replies 0 retweets 1 like -
Replying to @murraygilman @tlowdon
Loretta Torrago Retweeted Health Nerd
Loretta Torrago added,
2 replies 0 retweets 1 like -
Replying to @Loretta_Torrago @tlowdon
https://www.frontiersin.org/articles/10.3389/fpubh.2017.00307/full …. Maybe this will help. Sensitivity using Bayes 2x2 table is a/a+c. I don’t know if this changes the analysis from the paper or not. Just FYI
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Replying to @murraygilman @tlowdon
I've asked questions of both
@GidMK and@MackayIM and gotten replies. You really should ask. If there's a mistake or clarification warranted, I'd bet they'd be happy for it.1 reply 0 retweets 2 likes -
Replying to @Loretta_Torrago @murraygilman and
Seems like
@GidMK has addressed this already?2 replies 0 retweets 2 likes
Do I ever really address anything tho? Maybe I'm just an amorphous but very shiny headpic.twitter.com/FR18sZuVk4
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I've bookmarked a lot of stuff from a very amorphous and shiny head so I'm thinking there's gotta be more ....
0 replies 0 retweets 1 likeThanks. Twitter will use this to make your timeline better. UndoUndo
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