Can you answer the question that 3 out of 4 doctors asked got wrong?

The study I'm referring to was 10+ years ago now, but it confirmed an even earlier study that had the same result. Interpretation of diagnostic test results is so important, but SO easily misunderstood, even by those that rely on them most. And even small misunderstandings can have a big impact on our personal medical decisions. There is uncertainty in every aspect of medical care, we need to be comfortable with that, but the more informed we all are about what the numbers actually mean (and what they don't), the more empowered our decisions can be. Medicine's uncomfortable relationship with math: Calculating positive predictive value, by A K Manrai, G Bhatia, J Strymish et al (2014)