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Level 4

Screening for Disease


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gold standard test
diagnostic test regarded as definitive in determining whether an individual has disease
Sensitivity
How well does the test detect the condition - sick people correctly identified as sick
Specificity
How good is the test at correctly excluding people without the condition - healthy people correctly identified as healthy
positive predictive value
probability someone has the condition if they test positive
Negative predictive value
probability someone does not have the condition if they test negative
Accuracy
the proportion of all tests that have given the correct result