Relative risk the ratio of the incidence of the outcome among exposed individuals to the incidence among nonexposed individuals. Attributable risk an estimate of the number of cases of a disease which might be prevented if the risk factor were eliminated. Odds ratio indicates the odds that a specific outcome will occur among people who have a specific risk factor as compared with likelihood that nonexposed people will have the specific outcome. Morbidity rates the incidence of a disease in a population over a specified time period. Often expressed in units such as 100,000.
Mortality rates an enumeration of deaths over a defined period of time.
These rates may be calculated for the entire population, crude mortality rate, or for subgroups of the population. Age-specific mortality rate enumerates the deaths occuring within a defined age group over a defined time period. Cause-specific mortality rate enumerates the deaths occuring during a specified time period due to a specific disease. Review the graph below.