A measure of the risk of a certain event happening in one group compared to the risk of the same event happening in another group. In cancer research, relative risk is used in prospective (forward loo [..]

A measure used to describe the increase (or decrease) in risk related to a specific risk factor. A relative risk is the ratio of two absolute risks: the numerator is the absolute risk among those with [..]

The probability of an event occurring in the study group compared with the probability of the same event occurring in the control group, described as a ratio. If both groups face the same level of ris [..]

Ratio of the risk of an event among an exposed population to the risk among the unexposed.

Comparison of the ratio of occurrence of a specific disorder or condition between a group having specific risk factors as opposed to those not having those risk factors.

the ratio between the risk for disease in an irradiated population to the risk in an unexposed population. A relative risk of 1.1 indicates a 10% increase in cancer from radiation, compared with the & [..]

The ratio of the risk of an event in the experimental group compared to that of the control group (RR=EER / CER). Not to be confused with relative risk reduction (see below).

(i) The ratio of the risk of disease or death among the exposed to the risk among the unexposed; this usage is synonymous with risk ratio; (ii) alternatively, the ratio of the cumulative incidence rat [..]

the probability of a negative outcome in the exposed group divided by the probability of the negative outcome in the non-exposed (control) group.

A measure of the risk of a certain event happening in one group compared to the risk of the same event happening in another group. In cancer research, relative risk is used in prospective (forward looking) studies, such as cohort studies and clinical trials. A relative risk of one means there is no difference between two groups in terms of their ri [..]

A measure of how much a particular risk factor (cigarette smoking) influences the risk of a specified outcome (death by age 70).

The proportion of diseased people amongst those exposed to the relevant risk factor divided by the proportion of diseased people amongst those not exposed to the risk factor. This should be used in th [..]

The ratio of the probability in one group compared to the probability in another group. Although reported less often in SNP studies than odds ratios, the RR is more intuitive (and generally lower). No [..]

A comparison of the risk of some health-related event such as disease or death in two groups.

The ratio of the probability of developing, in a specified period of time, an outcome among those receiving the treatment of interest or exposed to a risk factor, compared with the probability of deve [..]

Ratio of the risk in an exposed population (absolute risk

These are some of the more common measures of association (MA). A MA is any mathematical measure that is used to quantify the association between two or more variables; thus, it is a measure of the ex [..]

is a ratio measure of association in cohort studies and experimental studies. The relative risk is the incidence of the outcome in the exposed (or intervention) group divided by the incidence of the outcome in the not-exposed (or control) group.

To calculate a, b, c, d: see the 2x2 table

1. The ratio of the risk of an event among those exposed to a risk factor to the risk among those not exposed (i.e., the risk ratio). 2. The ratio of the incidence rate in the exposed to the incidence rate in the unexposed (i.e., the rate ratio).