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Randy Neil Biostats 28: USMLE Biostats Shorts - Less than 1 minute
Episode Notes
USMLE purpose: Rapid-review a single biostats shortcut in Anki-card style.
How to use this page
- Try to answer the one-liner from memory.
- Open the toggle to check yourself.
- Use this as a quick pre-block warmup.
Episode metadata
| Field | Details |
| Episode | Randy Neil Biostats 28 |
| Topic | Biostats short |
| Runtime | 1 min |
| Published | 2024-02-04 |
| Source | Open YouTube video |
One-liner
When a biostats short asks for a metric, name the metric before doing math .
Rapid recall: positive test → truly disease?
Positive predictive value.
Mini-check
PPV denominator = all positive tests = TP + FP.
Extra practice
A patient has a positive screening test. Which denominator belongs to PPV?
- A) Everyone with disease
- B) Everyone without disease
- C) Everyone with a positive test
- D) Everyone with a negative test
Reveal answer & explanation
Answer: C) Everyone with a positive test
PPV answers: among people who test positive, how many truly have disease?