The incidence of disease in a population is termed the
The basic incidence rate (sometimes called just incidence) is a measure of the frequency with which a disease occurs in a population over a period of time.The formula for calculating an incidence rate is: 1  The numerator (x). 2  should include only new cases of the disease that occurred during the specified period.ncidence. The basic incidence rate (sometimes called just incidence) is a measure of the frequency with which a disease occurs in a population over a period of time. The formula for calculating an incidence rate is: Incidence. The basic incidence rate (sometimes called just incidence) is a measure of the frequency with which a disease occurs in a population over a period of time. The formula for calculating an incidence rate is:1  The numerator (x). 2  should include only new cases of the disease that occurred during the specified period.ncidence. The basic incidence rate (sometimes called just incidence) is a measure of the frequency with which a disease occurs in a population over a period of time. The formula for calculating an incidence rate is: Definition: The incidence of a disease is the number of new cases arising in a given period of time in a specified group of people (population). Although prevalence and incidence are related, they measure different aspects of disease burden in a population.efinition: The incidence of a disease is the number of new cases arising in a given period of time in a specified group of people (population). Although prevalence and incidence are related, they measure different aspects of disease burden in a population. Incidence should not be confused with prevalence, which is the proportion of cases in the population at a given time rather than rate of occurrence of new cases.Thus, incidence conveys information about the risk of contracting the disease, whereas prevalence indicates how widespread the disease is.ncidence is usually more useful than prevalence in understanding the disease etiology: for example, if the incidence rate of a disease in a population increases, then there is a risk factor that promotes the incidence. A mortality rate is the number of deaths due to a disease divided by the total population. If there are 25 lung cancer deaths in one year in a population of 30,000, then the mortality rate for that population is 83 per 100,000.revalence is a measure of disease that allows us to determine a person's likelihood of having a disease. Therefore, the number of prevalent cases is the total number of cases of disease existing in a population. For example, the prevalence of obesity among American adults in 2001 was estimated by the U. S. Centers for Disease Control (CDC) at approximately 20.9%. Prevalence is a term which means being widespread and it is distinct from incidence.Prevalence is a measurement of all individuals affected by the disease at a particular time, whereas incidence is a measurement of the number of new individuals who contract a disease during a particular period of time.t can be used for statistics on the occurrence of chronic diseases. This is in contrast to period prevalence which is a measure of the proportion of people in a population who have a disease or condition over a specific period of time, say a season, or a year. Incidence is a measure of the probability of occurrence of a given medical condition in a population within a specified period of time. Although sometimes loosely expressed simply as the number of new cases during some time period, it is better expressed as a proportion or a rate with a denominator.ncidence is usually more useful than prevalence in understanding the disease etiology: for example, if the incidence rate of a disease in a population increases, then there is a risk factor that promotes the incidence. prevalence rate the number of people in a population who have a disease at a given time; the numerator is the number of existing cases of disease at a specified time and the denominator is the total population.Time may be a point or a defined interval, and is traditionally the former if unspecified.ncidence rate the risk of developing a particular disease during a given period of time; the numerator of the rate is the number of new cases during the specified time period and the denominator is the population at risk during the period. Compare prevalence r. Prevalence is a measure of disease that allows us to determine a person's likelihood of having a disease. Therefore, the number of prevalent cases is the total number of cases of disease existing in a population.revalence is a measure of disease that allows us to determine a person's likelihood of having a disease. Therefore, the number of prevalent cases is the total number of cases of disease existing in a population. The incidence rate is the number of new cases per population at risk in a given time period. When the denominator is the sum of the person-time of the at risk population, it is also known as the incidence density rate or person-time incidence rate.ncidence is usually more useful than prevalence in understanding the disease etiology: for example, if the incidence rate of a disease in a population increases, then there is a risk factor that promotes the incidence.
Prevalence