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:
“No one—man or woman—can have it all without support from the workplace and genuine help at home. Women, regardless of how they have chosen to lead their lives, can now breathe a collective sigh of relief that superwoman is dead.”
—Deborah J. Swiss (20th century)
“Yet time and space are but inverse measures of the force of the soul. The spirit sports with time.”
—Ralph Waldo Emerson (1803–1882)
“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)