So, according to this, the false positive rate for the Apple Watch in detecting atrial fibrillation is 0.04% (99.6% correct) This means that, on average, Apple Watches will be wrong more than 80% of the time Sound counterintuitive? This is the issue with population screeninghttps://twitter.com/statnews/status/1040273579391242242 …
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You are too optimistic about actual medical practice. Often even bad tests are overused (eg the PSA test in the USA, described by its inventor as a public health catastrophe but still far too widely used).
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