Lead time bias

Time between a new disease's identification and first diagnoses

Lead time bias happens when survival time appears longer because diagnosis was done earlier, irrespective of whether the patient lived longer. Lead time is the duration of time between the detection of a disease and its usual clinical presentation and diagnosis. For example, it is the time between early detection by screening and the time when diagnosis would have been made clinically. It is an important factor when evaluating the effectiveness of a specific test.

This keyword could refer to multiple things. Here are some suggestions: