In the usual medical examinations, the physician looks out for signs that one has already contracted certain diseases.  By the time the symptoms are identified and a diagnosis is made, the patient has already got the disease, and only corrective measures can be taken to treat the condition, if it is treatable.

However, in the case of the DSGT, it identifies the areas of higher risk—the conditions that a person is likely to develop.  This is even before the onset of the disease.  This allows preventive measures to be taken to prevent the disease.

In essence, most clinical laboratory tests are ordered for the purpose of directing interventions for a current health disorder.  In contrast, genetic tests can be used in asymptomatic individuals to identify a future risk of disease, a mutation that possesses a potential risk to an unborn child, or the presence of an active disease process.  Predictive testing has the ability to identify an asymptomatic individual’s risk of developing a disorder years before the onset of symptoms but does not provide information about the timing and severity of outcomes.