screening and diagnosis

Question 1

principles of test accuracy

Answer 1

reliability - ability to produce similar results under different conditions
validity - ability to discriminate between healthy and diseased individuals

Question 2

principles of validity

Answer 2

sensitivity - ability to correctly test people with a disease
specificity - ability to correctly test those without the disease

Question 3

what does it mean if a test has 100% sensitivity

Answer 3

false negatives = 0

Question 4

high sensitivity =

Answer 4

low false negatives = trust the negative test to RULE OUT disease

Question 5

high specificity =

Answer 5

low false positives = trust the positive test to RULE IN diagnosis