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:
“I have often been downcast, but never in despair; I regard our hiding as a dangerous adventure, romantic and interesting at the same time. In my diary I treat all the privations as amusing. I have made up my mind now to lead a different life from other girls and, later on, different from ordinary housewives. My start has been so very full of interest, and that is the sole reason why I have to laugh at the humorous side of the most dangerous moments.”
—Anne Frank (1929–1945)
“This is no time to lend money, especially upon bare friendship without security.”
—William Shakespeare (1564–1616)
“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)