For reference, this means that in a population where 10 in 1,000 people had cancer, you'd correctly diagnose 4 and have 208 false positives for a positive predictive value (how likely a +ve test is to be right) of 4/212 or 1.9% That's...not brillianthttps://twitter.com/whereisdaz/status/1191104549391437824 …
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This is the paradox of screening - if the test isn't incredibly precise, and the condition is quite rare (as breast cancer is before age 50), then it can often do more harm than good!
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Goodness even the PSA tests looks good compared to this!
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