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PrevalencePlease Note:
This legacy resource has now been archived. If you still require access then please contact us via helm@nottingham.ac.uk and we will get back to you. Thank you for your patience and understanding.
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The easiest way to describe diseases in populations is to just count the number of cases. But this information is more useful if it's given in the context of a whole defined population. Then you can see the proportion of people who have the disease at any one time. This is called "prevalence" and can be expressed symbolically: a/a+b. This is a proportion. A ratio would not include 'a' in the denominator: a/b
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------------------------------------ Page created: 5 June, 2002 By: Dawn Leeder Last updated: 17 October, 2019 1:27 PM By: Michael Taylor |