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:
“A true proposition is a proposition belief which would never lead to such disappointment so long as the proposition is not understood otherwise than it was intended.”
—Charles Sanders Peirce (1839–1914)
“... imprisonment itself, entailing loss of liberty, loss of citizenship, separation from family and loved ones, is punishment enough for most individuals, no matter how favorable the circumstances under which the time is passed.”
—Mary B. Harris (1874–1957)
“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)