The usual time to death after diagnosis of disease X is 2 years.A screening program allows for the early detection of disease X,on average 1 year earlier than the usual diagnosis; however,there is no available treatment even in early stages of disease X.With the screening program it seems like the time to death has increased to 3 years; however,this is only due to the early diagnosis thanks to the screening program.What is the name of the issue previously described?
A) Timing bias
B) Survival bias
C) Selection bias
D) Confounding
E) Lead-time bias

Question

Quizplus · Accepted Answer

Lead-time bias describes the false,seemingly increased survival due to an early diagnosis with no delay in the time of death.

The Usual Time to Death After Diagnosis of Disease X