Case-control study design — MRCPCH TAS MCQ

Instant feedback + full explanation. One question, done properly.

ModerateStatistics and evidence-based medicineCase-control study designMRCPCH TAS

A team identifies children with leukaemia and matched children without leukaemia, then reviews previous CT exposure. Which study design is most likely?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: A — Case-control study

A case-control study starts with outcome status and retrospectively compares prior exposure. A prospective cohort would recruit by exposure status and follow children forward to see who develops leukaemia. The pearl is that case-control studies are efficient for rare outcomes.

Reference: RCPCH TAS specimen paper; CEBM study designs; The Science of Paediatrics MRCPCH Mastercourse