USMLE purpose: Rapid-review a single biostats shortcut in Anki-card style.

How to use this page

1. Identify the clue.
2. Recall the formula.
3. Open the answer toggle.

• Episode metadata

One-liner

For case-control studies, think odds ratio, not relative risk.

• Rapid recall: what measure goes with case-control?
• Mini-check

Extra practice

A study starts with patients who have pancreatic cancer and matched controls without pancreatic cancer, then asks about prior alcohol exposure. What measure is most appropriate?

• A) Relative risk
• B) Odds ratio
• C) NNT
• D) Sensitivity
• Reveal answer & explanation