PPV is calculated using the formula: \[ \text{PPV} = \frac{\text{True Positives}}{\text{True Positives} + \text{False Positives}} \] For example, if a test for HPV detects 80 true positive cases and 20 false positive cases, the PPV would be: \[ \text{PPV} = \frac{80}{80 + 20} = 0.80 \text{ or } 80\% \]
