A genetic test is valid and beneficial if it provides accurate results. There are 2 main measures of testing its accuracy: analytical validity and clinical validity.
- Analytical validity– It indicates how well does the test analyse the genetic variations such as DNA sequence variants, chromosomal addition/ deletion.
- Clinical validity– It shows how well is the genetic test results predicts the presence, absence, or risk of a genetic disorder.
Apart from the above measures, a criteria called clinical utility is also considered while ascertaining the validity of a genetic test. Clinical utility refers to how well the test helps in deciding the diagnostic steps, plan management, or preventive strategies of a genetic disease.