Positive Predictive Value (PPV): The probability that those returning a POSITIVE test result do in fact have the disease they have been tested for. Negative Predictive Value (NPV): The probability that those returning a NEGATIVE test result do not have the disease they have been tested for. Test Sensitivity (Sens): The ability of the TEST […]
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Research & Statistics
Positive Predictive Value (PPV): What is it?
What is a Positive Predictive Value (PPV)? Use this interactive tutorial to learn and calculate the PPV and more. The easiest way to learn your stats. Another must for those doing research or preparing for exams.
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Negative Predictive Values (NPV) – learn more
What is a Negative Predictive Value (NPV)? Use this interactive tutorial to learn and calculate the NPV and more. Its the easiest way to learn your stats. A must for those doing research or preparing for exams.
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The Relative Risk – What is it?
How do you calculate the relative Risk or Risk Ratio? Use this interactive tutorial to learn and calculate these ratios and more. Another must for those doing research or preparing for exams. There is no easier way to learn statistics.
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Test Sensitivity: What is it?
Just what is Test Sensitivity? Use this interactive tutorial to learn and calculate test sensitivity. Another must for those doing research or preparing for exams.
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Two trials in different populations?
Two trials of the same intervention involving two different populations with different baseline risk of the disease of interest. How is this going to affect your results: the Risk Ratio (Relative Risk), Risk Reduction, and the Number Needed to Treat? Find out more.
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