However, the researchers also observed that these biomarkers had low positive predictive values, meaning elevated ... biomarkers as screening tools in the population at this stage.

If this test is used in a setting where 0.2% of people have HIV (for example, among the general population in the UK), the probability ... are known to healthcare workers as the ‘positive predictive ...

Conclusion: The results of our meta-analysis demonstrate that in patients taking ASA, there is a decrease in the positive predictive value (PPV ... effectiveness of population-based screening.