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by thaumasiotes
234 days ago
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> If the stats were as good as the hyperbole in the article, it would clearly state the only 2 metrics that really matter: predictive value positive (what's the actual probability that you really have cancer if you test positive) and predictive value negative (what's the actual probability that you're cancer free if you test negative). As tptacek points out, these metrics don't just depend on the sensitivity and specificity of the test This is a bizarre thing to say in response to... a clear statement of the positive and negative predictive value. PPV is 62% and NPV is "over 99%". Your calculations don't appear to have any connection to your criticism. You're trying to back into sensitivity ("the test missed the majority of people who had cancer") from reported PPV and NPV, while complaining that sensitivity is misleading and honest reporting would have stated the PPV and NPV. |
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