Point prevalence: Difference between revisions
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'''Assistant Editor(s)-In-Chief:''' [[Kristin Feeney|Kristin Feeney, B.S.]] | |||
In [[epidemiology]], '''point prevalence''' is a measure of the proportion of people in a population who have a disease or condition at a particular time, such as a particular date. It is like a snap shot of the disease in time. 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. | ==Overview== | ||
In [[epidemiology]], '''point prevalence''' is a measure of the proportion of people in a population who have a disease or condition at a particular time, such as a particular date. It is like a snap shot of the disease in time. 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.{{cite book|author=Gerstman, B.B.|year=2003|title=Epidemiology Kept Simple: An Introduction to Traditional and Modern Epidemiology (2nd ed.)|location=Hoboken, NJ|publisher=Wiley-Liss}} | |||
==Calculation== | |||
Point prevalence can be described by the formula: | Point prevalence can be described by the formula: | ||
Prevalence = Number of existing cases on a specific date ÷ Number of people in the population on this date | Prevalence = Number of existing cases on a specific date ÷ Number of people in the population on this date | ||
==References== | ==References== | ||
{{ | {{reflist|2}} | ||
[[Category:Epidemiology]] | [[Category:Epidemiology]] | ||
{{WH}} | {{WH}} | ||
{{WS}} | {{WS}} | ||
Revision as of 18:29, 21 December 2011
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Assistant Editor(s)-In-Chief: Kristin Feeney, B.S.
Overview
In epidemiology, point prevalence is a measure of the proportion of people in a population who have a disease or condition at a particular time, such as a particular date. It is like a snap shot of the disease in time. 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.Gerstman, B.B. (2003). Epidemiology Kept Simple: An Introduction to Traditional and Modern Epidemiology (2nd ed.). Hoboken, NJ: Wiley-Liss.
Calculation
Point prevalence can be described by the formula: Prevalence = Number of existing cases on a specific date ÷ Number of people in the population on this date