Relative risk

Relative risk is an indicator describing the relationship between exposure to risk factor and health consequences. Determines the degree of association detected:
 * RR = 1 means that the given factor has no influence on the development of the disease,
 * RR > 1 means the exposure is a risk factor,
 * RR < 1 means that the exposure is a protective factor.

Relative risk is expressed as a ratio of incidence of disease in the exposed and non-exposed group. It should be distinguished from odds ratio and absolute risk.

$$RR= \frac {p_\text{expo}}{p_\text{neexpo}} $$

Related articles

 * Absolute risk
 * Atributive risk
 * Odds ratio
 * Risk factor and misleading factor