Episode 2: Pretest Probability

Summary: Essential to diagnosis is estimating the chance of disease in patients before testing, pretest probability. Estimate pretest probability based on 1) incidence, 2) history, 3) exam.
Contents:
00:00 Introduction
00:52 Example: cardiac ischemia (0:52)
01:31 Example: HIV (1:31)
02:14 Diagnostic ”zebras”
02:24 Testing thresholds
02:40 Treatment thresholds
03:00 Best situations to test