Designing a Case-Control Study

For rare diseases and exposures that are hard to measure in a full cohort, the case-control design is the efficient, elegant answer, if you choose your controls correctly. This level teaches you the logic and the traps that catch beginners.

Who this level is for

Researchers and clinicians studying rare outcomes or working with limited time and budget, and anyone who wants to read case-control studies critically. Recommended after Levels 1-3.

What you'll learn

• Why and when a case-control design is the smart, efficient choice
• How to define cases clearly and identify the source population
• The art of selecting valid controls, population, hospital and other sources
• How many controls to use, and which control-sampling strategy fits
• The steps of a case-control study, and its true strengths and limitations

You finish with: A case-control version + your chosen observational design.