Public Health and EBM

Question 1

What is ‘sensitivity’?

Answer 1

How well the test detects a positive when the disease is present - the ratio of true positives to all cases

Question 2

What is ‘specificity’?

Answer 2

How well the test detects a negative when the disease is not present - the ratio of true negatives to all people without the disease

Question 3

What is the sensitivity formula?

Answer 3

True Positive / True Positive + False Positive x 100

Question 4

What is the specificity formula?

Answer 4

True Negative / True Negative + False Negative x 100

Question 5

What is the ‘positive predictive value’?

Answer 5

How reliable the test is when the disease is present - the ratio of true positives to all positives

Question 6

What is the ‘negative predictive value’?

Answer 6

How reliable the test is when the disease is not present - the ratio of true negatives to all negatives

Question 7

What is the positive predictive value formula?

Answer 7

True Positives / True Positives + False Positives x 100

Question 8

What is the negative predictive value formula?

Answer 8

True Negatives / True Negatives + False Negatives x 100

Question 9

How do you find the ‘post test probability of disease’ and what is it ?

Answer 9

100% - NPV, probability that you’ll get the disease with a negative test result

Question 10

What is ‘prevalence’?

Answer 10

All people with the disease divided by the total number of people who took the test (False Negative + True Positive)

Question 11

What is public health?

Answer 11

The art and science of preventing disease, prolonging life, and promoting health through the organised efforts of society

Question 12

What are the three domains of public health?

Answer 12

Health improvement, health protection, and healthcare services delivery