To reduce the false-positive
rate closer to 10%, Asians need to have a cutoff threshold of 145 mg/dL, but then the sensitivity is only 80%.
It's a good technique because it is cheap and easy and fast, but it could also give you some false-positives
or overestimate results.
By incorporating the false-positive
result rates into protective-value calculations, a more accurate measure of the "net protective value" of a requirement may be derived, which reflects not only the mortality savings attributable to a requirement but also which includes the potential cost of good business lost.
One very important result of too many false-positive
and false-negative alarms is that they can overwhelm an IT staff with lots of "noise" and forensic work that leaves them chasing ghosts, consuming valuable security resources and eventually causing the IT staff to distrust the alerts.
Johnson's list of some 60 factors she describes as "known to cause false-positive
HIV-antibody test results" turns up regularly in denialist literature.
Honesty testing's false-positive
error rates - that is, the rate of incorrectly identifying honest persons as dishonest - range between an average of 73 percent and 97 percent, according to the APA's and OTA's 1990 reports (thus underperforming the polygraph's average error rate of about 50 percent, as calculated by myself and others who have conducted scientific reviews of the field).
Scientific journals and editors can avoid publishing false-positive
results through careful selection of highly qualified reviewers who are experts in the technology used and are therefore more likely to identify even subtle biases within the study design that could lead to false positives.
Parascript(R) AccuDetect(TM) to work with mammography systems in the early detection of breast cancer, projected to reduce industry problem of false-positives
and patient recalls by estimated 60 to 80 percent -
However, only [approximately equal to] 10% of positive results were confirmed by reverse transcription-PCR, which suggests frequent false-positive
results or viral clearance.
Several years ago, statistician Alicia Carriquiry of Iowa State University in Ames came up with a mathematical model to calculate this false-positive
The characteristics described provide for a false-positive
rate of 2% (98% of the time unarmed passengers will show up as negative).
They say the upside of having a cloud of suspicion removed is tempered by the possibility of false-positive
tests from taking other substances.