What is the definition of prevalence in epidemiology?

Definition of prevalence Prevalence, sometimes referred to as prevalence rate, is the proportion of persons in a population who have a particular disease or attribute at a specified point in time or over a specified period of time.

What is the meaning of the word prevalence?

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, whereas incidence refers to the number of new cases that develop in a given period of time.

What does prevalence mean in medical terms?

Listen to pronunciation. (PREH-vih-lents) In medicine, a measure of the total number of people in a specific group who have (or had) a certain disease, condition, or risk factor (such as smoking or obesity) at a specific point in time or during a given period of time.

What is the best definition for epidemiology?

By definition, epidemiology is the study (scientific, systematic, and data-driven) of the distribution (frequency, pattern) and determinants (causes, risk factors) of health-related states and events (not just diseases) in specified populations (neighborhood, school, city, state, country, global).

What is the difference between incidence vs. prevalence?

• Prevalence is the ratio of the total number of patients diagnosed and getting treatment to the total population whereas incidence is the ratio of total new cases in a population divided by total population • In studying etiology of a disease, it is incidence that is more important. Thus,…

What is a prevalence study?

Prevalence studies in epidemiology are studies conducted in order to examine the prevalence of a particular disease/condition at a certain point in time. It denotes the number of cases of the disease under study existing in the source population at a particular time. It is arrived at by comparing the number of people found to have…

What is prevalence in statistics?

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, whereas incidence refers to the number of new cases that develop in a given period of time.

Is prevalence a rate?

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.

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