Definitions for

**"Prevalence"****Related Terms:**Prevalence rate, Incidence, Incidence rate, Rate, Attack rate, Morbidity rate, Case fatality rate, Cohort study, Epidemiological study, Population, Cross-sectional study, Absolute risk, Epidemiology, Morbidity, Crude rate, Poisson distribution, Random sampling, Stratified sample, Parameter, Sample, Random sample, Universe, Systematic sample, Stratified random sample, Relative risk, Stratified sampling, Relative abundance, Demographic, Smr, Probability sample, Sampling distribution, Case control study, Inferential statistics, Case-control study, Sampling, Quota sample, Selection bias, Epidemic, Biased sample, Stratified random sampling, Probability sampling, Sample size, Simple random sampling, Mortality rate, Target population, Population projections, Law of large numbers, Time series, Composite sample

The quality or condition of being prevalent; superior strength, force, or influence; general existence, reception, or practice; wide extension; as, the prevalence of virtue, of a fashion, or of a disease; the prevalence of a rumor.

the measure of people in a population affected by a disease or condition at a particular time.

The number of existing cases in a population who have the disease at a given point (or during a given period) of time.

Prevalence is the number of cases of a disease, infected persons, or persons with some other attribute present during a particular interval of time. It is often expressed as a rate (for example, the prevalence of diabetes per 1,000 persons during a year).

The percentage of the population that is affected by a certain disease (such as cancer) at a specific time.

The total number of persons living with a specific disease or condition at a given time.

The proportion of persons in the population who actually have a certain disease at any given point in time.

In epidemiological studies of a disorder, the percentage of a population that has the disorder at a given time. Compare with incidence.

as used in epidemiology, the total number of cases of a disease in existence at a specific time and within a well-defined area.

"number or proportion of persons in a given time period with a specific condition or disease"

The number of cancers that exist in a given population. Prevalence is usually unknown because not all of the cancers have been diagnosed. (see Incidence).

The number of people in a particular area who currently have a disease and have not been cured of it.

The number of people with a condition in the population at risk at a given point in time.

The number of instances of a given disease or other condition, such as a BRCA1 mutation, in a given population at a designated time.

Proportion of the whole population affected.

The number of current cases of a condition or illness at one time, no matter when it started. Usually used to describe conditions that last a long time, or are chronic. The word "prevalence" is often used to mean prevalence rate.

The number of people with a specific condition in a given population.

The proportion or percentage of habitable sites or areas in which a particular species is present.

The number of cases of a disease that exist within a population as proportion of it, usually per 100,000 people

Represents new and pre-existing cases of a disease alive on a given date. Prevalence is a function of both the incidence of the disease and survival with the disease. Thus, the annual incidence of a disease in the United States may be 30,000/ total population per year (new cases that year) but the prevalence of that disease may be 200,000/total population per year (new cases plus preexisting cases from prior years).

is the number of instances of infections or of persons ill, or of any other event such as accidents, in a specified population, without any distinction between new and old cases.

The number of instances of a given disease or other condition in a given population at a designated time. If the period is not mentioned, the concept usually refers to the situation at a specified point in time, that is, point prevalence.

the proportion of population at one point in time, with a condition.

Number of people suffering from a disease in a specific period of time.

The number of events (for example, instances of a given disease or other condition) in a given population at a designated time

The number of cases of a disease in existence at a given time per unit of population, usually 100,000 persons.

the number of individuals in a population having a particular condition at a particular point in time

The frequency with which an inherited condition occurs in a population.

Proportion of cases that have a condition. [See accuracy, sensitivity, specificity

The proportion of people with a particular disease or condition in a specific population and at a given time.

The number or rate of cases that exist (prevail) at a specified time.

(epidemiology) the ratio (for a given time period) of the number of occurrences of a disease or event to the number of units at risk in the population

a superiority in numbers or amount; "there is a preponderance of Blacks in our prisons"

Occurrence of a disorder in the general population.

the frequency of occurrence of a disorder in a population.

The proportion (relative number) of persons afflicted by a disease in a given population at a given time point.

the level of a disease in a population.

Frequency of disease or infection found in a group, expressed as a proportion or in percent.

The proportion of individuals that have the characteristic of interest (e.g. infected or diseased).

a proportion (P) indicating the number of cases of a disease (D) within a population (N) at a specific time (P=D/N).

the proportion of diseased individuals in a population at any one time.

Measures the proportion of individuals who have a given disease or other attribute at a given time.

A measure of the burden of a health condition in a population; generally the number or proportion of cases of the health condition at a specified time point or period. Prevalence is affected by both the incidence and the duration of the health condition in a population.

The proportion of people in the whole population who are found with a particular disease at any one point in time, without taking into account when they first were diagnosed with the disease.

Total number of persons in a given population with a disease or other health-related event during a specified period of time, usually expressed as a percentage. The prevalence of smoking in U.S adults is approximately 25%.

the frequency of a particular condition within a defined population at a designated time (e.g., 12.6 million Americans living with heart disease in 1999, or 36.4% of African American men aged 20–74 years found to have hypertension in a survey conducted in 1988–1994).

the proportion of sampling entities (in a given population of interest) affected by a particular damaging agent.

The percentage of people in a given population that have a given disease, e.g. the prevalence of chlamydia in Clinic A is 5%, that is 5 out 100 individuals in Clinic A are infected with chlamydia.

the number of cases of hepatitis C in the community at any one time, usually expressed as a percentage of the population.

In regard to hepatitis C, prevalence relates to the number of cases in the community at any one time. It is usually expressed as a percentage or ratio. eg. 1% of the population, or 1 in 100 people.

This is defined as a number of cases of disease or infection existing at any given time in relation to the unit of population in which they occur.

The number or rate of conditions that exist in the population at any time.

incidence or how many cases of a disease occur.

the proportion of persons with a particular disease within a given population at a given time. ( Diagnosis)

The percentage of the population suffering from a disorder at a given point in time (point prevalence) or during a given period (period prevalence).

The proportion of people with a particular characteristic measured at one point in time. In this report, prevalence is expressed as a percentage (rate per 100) or as a rate per 100,000 population.

The number of instances of a disease or another condition in a population at a given time

The overall occurrence of a particular disease (new and existing cases) in a specific population at a specific point in time.

Occurrence in a particular area at a particular time.

total number of cases of a problem or disease in the population at a given time

The frequency of the condition under consideration in the population. For example, we calculate the prevalence of disease by dividing the number of diseased individuals by the number of individuals in the population. Prevalence is the prior probability of a specific condition (or diagnosis), before any other information is available.

The percentage of people with a condition at any given time.

The number of patients with a given condition at a given time as a mathematical function of the population.

The number or proportion of cases or events or conditions in a given population.

In epidemiology, this is the percentage of the population who at a particular time have the disease being studied. If you replace the topic by a media research measure, such as watching TV at a particular time, you immediately see the close link between epidemiological and media research measures. Just as the average audience to a station is the percentage reach times the average duration, the prevalence of a disease is its times the average duration.

the number people with the disease in a given population who are alive during a specified period of time

the total number of cases in an entire population.

The total number of cases of a disease in existence at a certain time in a designated area

The number of patients with a disease in the population at a specific time. For example, the prevalence of esophageal cancer is higher among African Americans than whites.

The total number of cases of a disease in existence at any one time in a defined population, including old and new cases. A prevalence rate is the total number of cases of a disease existing in a population divided by the total population.

Number of events present at a given point in time.

The number of disease cases (new and existing) within a population over a given time period.

Number of people portraying a certain condition in a stated population at a particular time or period of time, regardless of when the illness or condition began, divided by the number of persons in the population.

The total number of cases of a disease present within a given population at a particular time. The prevalence of giant cell arteritis in the United States, for example is estimated to be 160,000.

smoking prevalence is the percentage of the adult population (aged 15 years and above) who are smokers.

the proportion of the population infected at a particular time.

A measure of the proportion of people in a population who have some attribute or disease at a given point in time or during a specified time period. Point prevalence is the number of cases at one point in time and period prevalenced is the number of cases over a specifed time period (includes both the new [incident] cases over the period and existing cases of disease at a point in time).

the number of individuals with a condition in a specific population. The prevalence rate is determined by dividing the number of people with the condition by the total population.

statistic that equals the total number of people in a population with a certain disease at a given time.

The number of cases of an observation in a specified population at a given time.

the total number of cases of a disease in a given population at a specific time

The number of persons with a disease who are alive on a certain date.

Prevalence measures the number of cases of a certain disease in a population.

The number of people who have received a diagnosis of cancer who are alive at a given time; reflecting both the incidence of cancer and its survival pattern.

A measure of the proportion of persons in the population with a certain disease or condition at a given time.

the proportion of persons within a population who are currently affected by a particular disease

The total number of cases of a given disease in a specified population at a designated time. It is differentiated from INCIDENCE, which refers to the number of new cases in the population at a given time.

the number of instances of a given disease or other condition in a population at a designated time. Prevalence includes both new (incidence) and existing instances of a disease.

The total number of persons with a given disease at a designated time.

The proportion of a population having a particular condition or characteristic: eg the percentage of people in a city with a particular disease, or who smoke.

The number of existing cases of a disease in a defined population at a specified time.

The number of people in a given group or population who are reported to have a disease.

The proportion of individuals in a population having a disease. Prevalence is a statistical concept referring to the number of cases of a disease that are present in a particular population at a given time. See the entire definition of Prevalence

the number of people in a given population affected with a particular disease or condition at a given time. Prevalence can be thought of as a snapshot of all existing cases at a specified time. (Contrast with incidence.)

The number of all new and old cases of a disease in a defined population at a particular point in time.

The number of existing disease cases in a defined population during a specific time period [contrast with incidence].

In epidemiology, the number of cases in a given population at a given time. Often confused with incidence, e.g. incidence might be 2 per 100,000 per year and prevalence 60 per 100,000 populations. The prevalence of MS in Ireland is at least 100 per 100,000 populations.

The proportion of a population having a condition at a given point in time or over a fixed period of time. See also incidence.

A measure of the prevalence of disease in a population at one given time, e.g. cases per 100,000..

The number of instances of a given disease or other condition in a given population at a designated time divided by the population at risk of having the disease or condition.

The percent of the population with a particular condition or characteristic. To calculate prevalence you need to sum the number of individuals with a certain condition/characteristic and divide by the number of people in the population of interest over a specified time. (from the BRFSS site http://www.cdc.gov/brfss)

Estimate of the proportion of infected animals in a population at one given point in time; not to be confused with incidence..

Prevalence differs from incidence in that it does not convey information about risk. Prevalence is defined as the number of individuals with a certain disease in a population at a specified time divided by the number of individuals in the population at that time. (See Incidence)

The number of all cases of a disease existing during a given time period.

the total number of cases of a particular disease at a given moment in time, in a given population.

The number or proportion of individuals in a community or population with a given condition or problem.

in this case, a measure of the number of people with lupus in a certain place at a certain time. It is expressed as the number of people with lupus within a group of 100 000 people from the same area at the same time e.g. 28 people with lupus in every 100 000 people.

Commonly occurring infection of HIV or cases of AIDS in a population; generally refers to all cases existing with an infection/disease (i.e., HIV/AIDS) at a specified period of time.

the amount of existing disease in a given population at a certain time.

Black's medical dictionary, G Macpherson ed; 38th ed One of the main ways to measure the frequency of a disease in a particular population - it is the total number of cases that are present at any one time - covering both old and new cases.

The number of cases of a disease in a population at any given point in time.

In epidemiology, the number of existing cases of a disease present during a particular time period and in relation to the size of the population. Often expressed as a rate, e.g., the prevalence of diabetes per 1,000 persons per year.

A measure of the proportion of persons in the population with a particular disease at a specified time.

Number of instances of existing cases of a given disease or other condition in a given population at a designated time; sometimes used to mean prevalence rate. When used without qualification, the term usually refers to the situation at a specified point in time (point prevalence). Last, 1988 RT incidence

The number of cases of disease, infected persons, or persons with some other attribute, present at a particular time and in relation to the size of the population from which drawn.

The total number of individuals who have a disease at a given point in time. For example, the estimate that 4.5 million Americans currently have Alzheimer's disease is a prevalence statistic. Incidence is the number of new cases expected to occur over the course of a year or some other limited period.

he proportion of a population with a specific disease or condition at a given point in time.

Prevalence is the proportion of people in the entire population who have a disease at a certain point in time without regard to when they first got the disease. 2, 4

The proportion of people who have a given disease or condition at a specified point in time. It is not truly a rate, although it is often incorrectly called prevalence rate.

The percentage of a population that is affected with a specific disease at a given time.

A measure of the proportion of people in a population affected with a particular disease at a given time.

Number of people who have a certain disease at a certain time.

The percent of cows or mammary gland quarters that are infected at any one time.

The number of all old and new cases of a disease during a given period of time.

The number of existing cases of a particular condition in a specified area at a specified time in a given population.

The proportion of people in a defined group who have a disease, condition or injury. In the context of diagnosis, this is also called " pre-test probability." To be distinguished from incidence.

The proportion of disease cases that exist within a population at a specific point in time, relative to the number of individuals within that population at the same point in time.

The number of cases of a specific disease in a given population at a certain point in time.

The number of people in the United States affected by a disease or diseases in a year.

a measure of how common a disease is in a defined population as expressed in the total number of cases of a disease at any one time (see: incidence)

number of cases of a disease or occurrence of an event in a given period; expressed as a ratio to the total population studied

In epidemiology, the prevalence of a disease in a statistical population is defined as

prevalence - malignant pleural mesothelioma.

Refers to the percentage of women who reported being victimised at least once during a specific period, such as during the previous 12 months or 5 years prior to the survey or over their lifetime.

The measure of how often the collection of items in an association occur together as a percentage of all the transactions. For example, "In 2% of the purchases at the hardware store, both a pick and a shovel were bought."

Predominant or extensively existing.

An alternative term for Support.