Screening: practice question

The best answer is D, Earlier diagnosis makes survival from diagnosis appear longer. Lead-time bias occurs when screening advances diagnosis date without changing death date, artificially increasing measured survival after diagnosis.

Missing cases is false-negative error.

Adverse effects are screening harms but not lead time.

Harmless detection is overdiagnosis.

It tests Screening in PSM. The correct option holds because: Correct: earlier clock start creates apparent longer survival.

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

Practise biostatistics with small calculations until sensitivity, predictive values and risk measures are automatic. Then use the flashcards and the other PSM questions on this site to test what stuck.

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.