In order to learn more about a person’s Non-Invasive Prenatal Testing (NIPT) test results, they may use a math formula to examine the true positive (positive predictive value), false positive, true negative (negative predictive value), or false negative rate of the specific test. One available calculator from the National Society of Genetic Counselors allow the calculation of a test’s Positive Predictive Value (PPV) and Negative Predictive Value (NPV) of noninvasive prenatal tests (NIPT), also known as Cell Free DNA Screening (cfDNA), based on estimates of population prevalence or by entering specific prevalence numbers. It can be found at https://www.perinatalquality.org/Vendors/NSGC/NIPT/.
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