Clinical Tests

Question 1

Accuracy

Answer 1

How close the result is to the true value

Question 2

Precision

Answer 2

How predictable the test results will be

Question 3

False Positive

Answer 3

Test suggests disease but it is not present

Question 4

False Negative

Answer 4

Test suggests no disease but disease is present

Question 5

True Positive

Answer 5

Test suggest disease and patient does have it

Question 6

True Negative

Answer 6

Test suggests no disease and no disease is present

Question 7

Sensitivity

Answer 7

% of people with a disease who’s test suggested disease present

Question 8

Specificity

Answer 8

% of people without a disease who’s test suggested they were healthy

Question 9

Positive Predicted Value

Answer 9

% of people with a positive test who have the disease

Question 10

Negative predicted value

Answer 10

% of people with a negative test who don’t have the disease

Question 11

Incidence

Answer 11

Number of new cases of disease occurring in a population during a specific time period/ number of people exposed to the risk of developing the disease during that period of time

Question 12

Prevalence

Answer 12

Number of cases of a disease present in a population at a specific point in time/ number of persons at risk of having the disease at that point in time

Question 13

What happens to the positive predicted values as prevalence falls?

Answer 13

Falls

Question 14

What happens to the negative predicted value as prevalence falls?

Answer 14

Rises