Enter the true negative rate and the false-negative rate into the calculator to determine the negative predicted value.

Negative Predictive Value Formula

The following formula is used to calculate a negative predictive value.

NPV = TNR / (TNR + FNR)

  • Where NPV is the negative predictive value
  • TNR is the true negative rate
  • FNR is the false negative rate

Negative Predictive Value Definition

A negative predictive value is defined as the probability that a negative result will be a false negative.


Negative Predictive Value Example

How to calculate negative predictive value?

  1. First determine the true negative rate.

    Calculate the rate at which a true negative test result is found.

  2. Next, determine the false negative rate.

    Calculate the rate at which a negative test results in a false negative.

  3. Finally, calculate the negative predictive value.

    Using the formula, calculate the NPV.

FAQ

What is a negative predictive value?

A negative predictive value is a probability or chance that people who get a negative test result, actually do not have whatever was being tested for. In other words, it’s a measure of how accurate a given test is.

What is a positive predictive value?

A positive predictive value is a probability that you actually have a disease given positive test results.



negative predictive value calculator
negative predictive value formula