Health Topics – Johns Hopkins Medicine Podcasts
Jul 3, 2026 · 1 min · 3 segments
A blood test used for population based cancer screening fell short of allowing cancers to be detected earlier, was cost prohibitive and delayed diagnoses for others, a new study shows. Johns Hopkins…
Elizabeth TracyThose are the kinds of things that consume resources, particularly false positives.
If you have a suspicion of something and then you have to chase it down, it consumes resources.
If you didn't have a cancer, then you wouldn't have been subjected to that.
If you had a positive test, how sure is it that you actually have a cancer? That's the predictive value.
resource-constrained environment, the real premium tests are those that have a high negative predictive value, i.e., you undergo a test that says you don't need to do 10 more things, that you are, in fact, safe for the time being, and you're sure that you're safe.
Those are the kinds of things that consume resources, particularly false positives.
If you have a suspicion of something and then you have to chase it down, it consumes resources.
If you didn't have a cancer, then you wouldn't have been subjected to that.
If you had a positive test, how sure is it that you actually have a cancer? That's the predictive value.
resource-constrained environment, the real premium tests are those that have a high negative predictive value, i.e., you undergo a test that says you don't need to do 10 more things, that you are, in fact, safe for the time being, and you're sure that you're safe.
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