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:
“Normally, people believe that, if they hear just words, that these words must lead to some thought.”
—Johann Wolfgang Von Goethe (1749–1832)
“Young children...are often uninterested in conversation It is not that they don’t have ideas and feelings, or need to express them to others It is simply that as one eight-year-old boy once told me, “Talking is okay, but I don’t like to do it all the time the way grown-ups do; I guess you have to develop the habit.””
—Robert Coles (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)