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

How to use this page

1. Recognize the curve.
2. Identify the time or survival level being asked.
3. Move horizontally/vertically on the graph.

• Episode metadata

One-liner

A stair-step survival curve is a Kaplan-Meier curve; vertical drops are events.

• Rapid recall: Kaplan-Meier vertical drop?
• Rapid recall: censored data?

Extra practice

On a Kaplan-Meier curve, a participant is lost to follow-up at year 3 without having the event. How should that be interpreted?

• Reveal answer & explanation