How do they determine statistics like “8 million people in the US have __ disease and another 1 million are undiagnosed”?

Question

I work in healthcare and there have been multiple times where I’ve seen disease prevalance statistics that include “undiagnosed cases”. If they have not been diagnosed then where do they get those numbers from?

In: 29

Answer 1

Was waiting for some gunner to show off their knowledge talking about odds ratio, relative risk blah blah lol