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prevalence

Epidemiology
(1) The number of people with a specific condition or attribute at a specified time divided by the total number of people in the population.
(2) The number or proportion of cases, events or conditions in a given population.
 
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. 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.
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Patient discussion about proportion

Q. I have found that my body weight has high proportion of water in total weight.. I have found that my body weight has high proportion of water in total weight, and it makes me to take less water and there by increasing my thirst, which in turn stresses my body a lot, what can I do to reduce this problem…..?

A. Your body has a way of compensating when it is lacking something. When you are dehydrated, your body will retain fluids, hence the excess water.
drink plenty of water daily and you will find that you will lose this puffiness as your body adjusts to getting what it needs.

More discussions about proportion
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References in periodicals archive
If more than half the votes support proportional representation on the first question, the proportional system with the most support on the second question will be adopted.
The minority deserve representation just like the majority.Countries using proportional system include Rwanda, Algeria, Angola, Burkina Faso, Denmark, Israel, Mozambique, Namibia and Norway.
Our current tax system is chronically complex and requires a radical overhaul and this low proportional tax rate policy should be a priority as we reach the promised land of Brexit.
He said the proportional representation systems are used by most of the world's major democracies.
where [alpha] is the mass proportional damping coefficient, M is the mass matrix, [beta] is the stiffness proportional damping coefficient, and K is the stiffness matrix.
According to these certificates, Panostaja will receive approximately EUR0.7m in proportional share from the estates.
For over three decades researchers have stressed the general importance of proportional reasoning (Che, 2009; Karplus, Pulos, & Stage, 1983).
The Scottish Parliament uses a mixed proportional representation system to elect its members.
Both parties want a proportional representation system to be implemented in time for next year's local council elections in Coventry.
Leading global technology provider, Emerson Industrial Automation is pleased to announce the launch of a new technical guide to proportional control valves.
The evaluation of efficiency improvement potential applying the proportional pressure control for variable speed pumps in heating systems is very important, while normally pumps are operating via constant differential pressure control.
The Joint Meeting Parties (JMP) has been demanding parliamentary elections and a system of proportional representation even prior to the 2011 uprising, which catapulted Yemen on a path of change.
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