false-negative result is one that is thought to be negative, but this turns out to be untrue. A child who has a false-negative result for CF is one who is told that they don't have the condition and then it turns out that they do. Depending on the condition, this can be very serious.
A true match that incorrectly recognized by a discriminator.
a negative test result for a person who does in fact have the disease or condition being tested for. See also false-positive.
A test result that shows no evidence of the disease or abnormality being investigated although the condition is actually present.
Affected cases missed by a diagnostic or screening test.
a Blood test result that is incorrectly normal in a person who has the suspected disease.