Lead time bias is the bias that occurs when two tests for a disease are compared, and one test (the new, experimental one) diagnoses the disease earlier, but there is no effect on the outcome of the disease—it may appear that the test prolonged survival, when in fact it only resulted in earlier diagnosis when compared to traditional methods. It is an important factor when evaluating the effectiveness of a specific test.
Read more about Lead Time Bias: Relationship Between Screening and Survival
Famous quotes containing the words lead, time and/or bias:
“My Vanquisher, spoild of his vanted spoile;
Death his deaths wound shall then receive, & stoop
*nglorious, of his mortall sting disarm’d.
I through the ample Air in Triumph high
Shall lead Hell Captive maugre Hell, and show
The powers of darkness bound. Thou at the sight
Pleas’d, out of Heaven shalt look down and smile,”
—John Milton (1608–1674)
“There are many events in the womb of time which will be delivered.”
—William Shakespeare (1564–1616)
“The solar system has no anxiety about its reputation, and the credit of truth and honesty is as safe; nor have I any fear that a skeptical bias can be given by leaning hard on the sides of fate, of practical power, or of trade, which the doctrine of Faith cannot down-weigh.”
—Ralph Waldo Emerson (1803–1882)