What are sensitivity and specificity in medical testing?
Sensitivity refers to the ability of a test to correctly identify those with the disease, while specificity refers to correctly identifying those without the disease.
Why are these two metrics important?
They are crucial for evaluating the effectiveness of a test. High sensitivity reduces false negatives, and high specificity reduces false positives.
Can you give an example of how they are used?
Sure! In a cancer screening test, high sensitivity ensures that most patients with cancer are detected, while high specificity ensures that healthy individuals are not wrongly diagnosed.
What happens if a test has low sensitivity or specificity?
Low sensitivity can lead to missed diagnoses, while low specificity can result in unnecessary anxiety and further testing for healthy individuals.
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