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:
“They be blind leaders of the blind. And if the blind lead the blind, both shall fall into the ditch.”
—Bible: New Testament Matthew 15:14.
“The glorious dream of full father involvement in infant care will not become a widespread reality overnight. But it can happen, and it eventually will happen,... A lot of progress may take place in a short period of time if we just lighten up, step back, and give the guys a decent chance.”
—Michael K. Meyerhoff (20th century)
“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)