Hacker News Reader

> So the odds of it being a false positive once again are about 50%.

It's even worse in practice, given that the false positive rate is probably not independent between both measurements

Yeah this is why in practice the followup to a mammogram is never going to be another mammogram. It's a different test which is more invasive but also produces far less false positives: taking a tissue sample.

Reply on news.ycombinator.com