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Epidemiology Exam 2 > Chapter 5 Terms > Flashcards

Chapter 5 Terms Flashcards

1
Q

What is the application of a disease- detection test to people who are as yet asymptomatic (no clinical sign)

A

screening

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2
Q

What is the confirmation of presence or absence of disease in someone suspected of or at risk of disease

A

diagnosis

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3
Q

What is the term that asks, “how well does the test do in different populations?”

A

reliability

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4
Q

People who are NOT diseased, but have a POSITIVE test

A

false positive (FP)

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5
Q

People who really HAVE the disease, but have a NEGATIVE test

A

false negative (FN)

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6
Q

People who HAVE the disease and have a POSITIVE test

A

true positive (TN)

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7
Q

People who are NOT diseased and have a NEGATIVE test

A

true negative (TN)

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8
Q

What is the ability of the test to identify those who are diseased in the screened population.

A

sensitivity

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9
Q

What is the equation for sensitivity?

A

TP/(TP+FN)

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10
Q

What is the ability of the test to identify those who do not have the disease?

A

specificity

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11
Q

What is the equation for specificity?

A

TN/ (TN+FP)

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12
Q

What is the probability that a person actually has the disease given a positive test?

A

Positive Predictive Value (PPV)

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13
Q

What is the PPV equation?

A

TP/TP+FP

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14
Q

What is the probability that a person is disease free given a negative test?

A

Negative Predictive Value (NPV)

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15
Q

What is the NPV equation?

A

TN/FN+TN

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16
Q

What is the two stage screening, a less expensive, less invasive or less comfortable test is generally performed first, and those who screen positive are recalled for further testing with a more expensive, more invasive or more uncomfortable test?

A

sequential screening

17
Q

What is the extent to which the screening test will produce the same or very similar results each time it is administered?

A

repeatability

Epidemiology Exam 2 (5 decks)

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