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.
The population attributable risk can be described as the reduction in incidence that would be observed if the population were entirely unexposed. A relative risk of 1 means that the event is more likely to occur in the exposed group.
#Statistics made easy pdf pdf#
(Note: the same cannot be done with the odds ratio) A relative risk of 1 means there is no difference between the two groups. Medical Statistics Made Easy, fourth edition (Original PDF from Publisher) Publisher PDFFile Size 10.00 MB28.42 2 Medical Statistics Made Easy has. Diseased Not diseased Exposed a b Not exposed c d The relative risk is calculated by the following formula RR= a/(a+b) divided by c/(c+d) Interpreting the RR is simple, for example if the RR of developing a side effect in drug X compared to drug Y is 20 then people taking drug X would be 20 times more likely to develop the side effect than people taking drug Y. The relative risk (RR) is the risk of an event relative to exposure. Essentially it tells you what proportion of deaths in the exposed group were due to the exposure. For example the attributable risk for lung cancer in smokers is the rate of lung cancer in smokers minus the rate of cancer in non smokers.
The attributable risk is the rate in the exposed group minus the rate in the unexposed group. Disease rates are used to measure diseases, help establish causation, and monitor interventions. A rate is a quantity measured with respect to another measured quantity (e.g.
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