Disease rates Flashcards
1
Q
rate in the exposed group minus the rate in the unexposed group
A
attributable risk
2
Q
example of attributable risk
A
rate of lung cancer in smokers minus the rate of cancer in non smokers
3
Q
Risk of an event relative to exposure. It is also known as the risk ratio.
A
relative risk
4
Q
What is relative risk ratio calculation
A
RR= a/(a+b) divided by c/(c+d)
5
Q
How do you know what RR means
A
If <1, less likely in exposed group
Equal to 1 there is no difference
If >1 more likely in exposed group
6
Q
What is population attributable risk and how is it calculated
A
- reduction in incidence that would be observed if the population were entirely unexposed. For instance how would the incidence of lung cancer change if everyone stopped smoking?
- It can be calculated by multiplying the attributable risk by the prevalence of exposure in the population.
7
Q
Attributable proportion is what?
A
proportion of the disease that would be eliminated in a population if its disease rate were reduced to that of the unexposed group.
