Question

1. Your friend has a sore throat and cough regularly, so his doctor referred him for a COVID-19 test, which was found negative. Imagine that the screening test has a sensitivity of 90% and specificity of 60%. What does these data tell you?

Answer 1

Many people without the disease will screen false positive when low specificity for screening is used.It is desirable to have a test that is both highly sensitive and highly specific which may be not possible.

A test with 100% sensitivity accurately identifies all patients with the disease. A test with 90% sensitivity detects 90% of the patients with the disease that is true positive but 10% with the diseases go undetected as false negatives.

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