Studies

Question 1

Cross Sectional Study

Answer 1

Prevalence of X across wide population at a particular point in time

Question 2

Cohort Study

Answer 2

Incidence or number of new cases within a population

Question 3

Case Control

Answer 3

Investigate exposure to a particular condition

Retrospective

Question 4

Absolute Risk reduction

Answer 4

Difference between % risk of primary outcome in both groups

Question 5

Relative risk reduction

Answer 5

Risk of primary outcome in each group / by each other x 100 = RR
100 - RR

Question 6

Number needed to harm

Answer 6

The number of people needed to be exposed in order for one person to come to harm

Question 7

Number needed to treat

Answer 7

Number of people needing to be exposed to prevent one bad outcome

Question 8

Retrospective Cohort

Answer 8

Starting at the outcome and looking back at the exposure

Question 9

Prospective cohort

Answer 9

Group of individuals who differ by one or more factors are followed