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:
“Well, the wedding is over, the good folks are joined for better for worse—a shocking clause that!—’tis preparing one to lead a long journey, and to know the path is not altogether strewed with roses.”
—Frances Burney (1752–1840)
“Affirmative action was never meant to be permanent, and now is truly the time to move on to some other approach.”
—Susan Estrich (b. 1952)
“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)