Tests that diagnose diseases are less reliable than you’d expect. Here’s why

Sat, 21 Oct 2023 03:52:37 +1100

Andrew Pam <xanni [at] glasswings.com.au>

Andrew Pam
<https://theconversation.com/tests-that-diagnose-diseases-are-less-reliable-than-youd-expect-heres-why-213359>

"You feel unwell, and visit your doctor. They ask some questions and take some
blood for testing; a few days later they call to say you have been diagnosed
with a disease.

What are the chances you actually have the disease? For some common
diagnostic tests, the answer is surprisingly low.

Few medical tests are 100% accurate. Part of the reason is that people are
inherently variable, but many tests are also built on limited or biased samples
of patients – and our own work has shown researchers may deliberately
exaggerate the effectiveness of new tests.

None of this means we should stop trusting diagnostic tests, but a better
understanding of their strengths and weaknesses is essential if we want to use
them wisely."

Cheers,
       *** Xanni ***
--
mailto:xanni@xanadu.net               Andrew Pam
http://xanadu.com.au/                 Chief Scientist, Xanadu
https://glasswings.com.au/            Partner, Glass Wings
https://sericyb.com.au/               Manager, Serious Cybernetics

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