Prevalence means ALL . After determination of a statistically significant relationship between a risk factor and a disease has been determined, the magnitude of the risk is calculated as the ratio of those who were exposed to the risk factorand developed the disease to the number of people exposed to the risk factor. 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.