What is the difference between relative risk and attributable risk?
Hereof, is attributable risk the same as risk difference?
Attributable risk (AR) or risk difference is the difference between the incidence rates in exposed and non-exposed groups. This reflects the absolute risk of the exposure or the excess risk of the outcome (e.g. disease) in the exposed group compared with the non-exposed group.
Furthermore, how do you calculate relative risk and attributable risk? The formula on the right shows that the attributable risk is related to the relative risk, but instead of it being the ratio of the incidence rates, it is the difference between them. Attributable risk is the difference in the probability of disease in exposed people and the probability of disease in unexposed people.
Similarly one may ask, what do we mean by relative risk as opposed to population attributable risk?
Relative risk (RR) is a measure of the strength of the association or causal link between a risk factor and an outcome. Attributable risk (AR) helps measure the excess risk associated with the risk factor. Population attributable risk (PAR) gives the added risk in relation to the total population.
What does attributable risk mean?
Attributable Risk(AR) (sometimes called Attributable Proportion or Attributable Fraction) is a measure of the prevalence of a condition or disease. Given a group of people exposed to a risk, it's the fraction who develop a disease or condition.