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Group prevalence is calculated by dividing the number of individuals in a group that have a disease by the total number of individuals in the group at risk of the disease.
Prevalence is a good measure of the amount of a chronic, low-mortality disease in a population, but is not of the amount of short duration or high-fatality disease.
Prevalence is often established by cross-sectional surveys.2.
The number or proportion of cases, events or conditions in a given population at a given time. Cf Incidence Pharmacology The proportion of positives among the agents tested. The number of people with a disease or condition in a given population at a specific time, either a point in time (point prevalence) or over a period of time (period prevalence).
Prevalence is expressed as a ratio in which the number of events is the numerator and the population at risk is the denominator. Statistics A term defined in the context of a 4-cell diagnostic matrix (2 X 2 table) as the amount of people with a disease, X, relative to a population.
Veterinary medicine(1) A clinical estimate of the probability that an animal has a given disease, based on current knowledge (e.g., by history of physical exam) before diagnostic testing.(2) As defined in a population, the probability at a specific point in time that an animal randomly selected from a group will have a particular condition, which is equivalent to the proportion of individuals in the group that have the disease.
adjusted rate a fictitious summary rate statistically adjusted to remove the effect of a variable, such as age or sex, to permit unbiased comparison between groups having different compositions with respect to these variables.
See also crude birth rate the number of live births in a geographic area in a defined period, usually one year, relative to some specified population.
Time may be a point or a defined interval, and is traditionally the former if unspecified.DMF rate an expression of the condition of the permanent teeth based on the number of teeth decayed, missing (or indicated for removal), and filled or bearing restorations.It is calculated by adding the number of carious permanent teeth requiring filling (D), carious ones requiring extraction (Mr), ones previously extracted because of caries (Mp), and permanent teeth (F).general fertility rate the most widely used measure of fertility; the number of live births in a geographic area in a year per 1000 women of childbearing age, which is usually defined as age 15 to 44 years.glomerular filtration rate an expression of the quantity of glomerular filtrate formed each minute in the nephrons of both kidneys, calculated by measuring the clearance of specific substances, e.g., inulin or creatinine.incidence 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.See also adjusted death rate the number of deaths in a certain period of time divided by the total of a given population.The crude death rate is the ratio of the number of deaths in a geographic area in one year divided by the average population in the area during the year.