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by thaumasiotes 2279 days ago
> Also TP + FN = Prevalence of the d[i]sease, but using P for prevalence and for positive creates a lot of confusion

Nobody's using P for prevalence. It's being used for positive. Take a look at the table.

> that is the number of d[i]seased people

Yes, that is what "positive" means. (In the context of a test for disease.)