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:
“If strange men come from the house
To lead her away do not say
That she is happy being crazy;
Lead gently astray;
Let her finish her dance,
Let her finish her dance.”
—William Butler Yeats (1865–1939)
“When I first got here, every time you’d say “breast feeding” on the House floor there would be a snicker.... this has been happening since creation. Can we finally get a grip on it?”
—Susan Molinari (b. 1958)
“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)