Public Health Explained - Positive Predictive Value & Negative Predictive Value

The cousin of sensitivity and specificity, positive predictive value and negative predictive value is a powerful measure of a diagnostic test. 

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Resources: 
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4608333/
https://www.researchgate.net/figure/Calculation-of-PPV-sensitivity-specificity-NPV-and-stroke-prevalence-PPV-positive_fig6_281682446