Match the term to the correct definition or example.

$$ Occurs when screening detects a disease earlier in its course than if screening had not been performed but the length of life of the person screened may not have increased.

A$.$ Length bias

B$.$ Measurement bias

Surveys or tests used in a study are not accurate or are of poor quality.

C$.$ Loss to follow up

D$.$ Lead$-$time bias

The overestimation of survival duration among screening detected cases caused by the relative excess of slowly progressing cases.

Occurs when those who don't participate over the entire course of a study are systematically different from those who do participate.