It was interesting yesterday to see an epidemiologist make a calculation whereas a clinician would think about the same scenario exactly backwards.
A clinician would see an adult with likely unilateral conjunctivitis and hypothesize a certain pre-test probability for COVID and use that plus the known sensitivity/specificity of the test to estimate the accuracy of the test.
The epidemiologist calculated the negative test into a starting risk number and then ran an equation about unilateral conjunctivitis and population risk of having COVID.
It makes perfect sense the two specialities would go at the same problem from opposite sides...a clinician is trying to decide if it’s worthwhile to run a test while the epidemiologist is thinking about population risk.
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