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(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.
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.


percentage or fraction of a whole. Often expressed also as a rate or ratio by comparison to a total or other population.

proportion differences
estimating the significance of differences between two proportional morbidities or mortalities.

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
References in periodicals archive ?
By contrast, high-energy X-rays would deliver proportionately more of their cell-killing energy outside of the target area -- in adjacent healthy tissue.
In the event that Trinsic proceeds with a possible reverse stock split, the number of rights issued per post reverse stock split share will not change, but the aggregate number of rights issued will be proportionately reduced by the final reverse stock split ratio.
For example, neodymium atoms are larger and somewhat lighter than samarium atoms, so they have a greater tendency to migrate into plumes of magma, which then rise to the crust, leaving proportionately more samarium in the mantle.
It looks at how Australia / New Zealand sits proportionately to other APAC markets in terms of voice investment.
The increase was slightly less with the rats in the dry box, rising to about 255 ppb at 10 kV, with proportionately lower increases at lower voltages.
As discussed below, PFIC stock owned directly or indirectly by a partnership may be treated as being owned proportionately by its partners; PFIC stock owned directly or indirectly by an intermediate corporation may be attributed to the U.
The harvester picks up some cover crop leftovers because they are proportionately larger than the small greens.
Proportionately less spending on traditional advertising.
Some argue that drug users commit proportionately more crimes than those who do not use drugs.
This is an important step in the race to make ever smaller microcircuits, because the oxide layer thickness must be reduced proportionately.
Moreover, when purchasing products or services, older consumers purchased proportionately more online than Generation Y consumers, with 36 percent of the older segment purchasing online compared with 26 percent of the younger segment.
attractive seating and standing tickets priced proportionately lower.