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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 ?
The Wooll or Cotton being thus prepared, one end of the Mass, Rope Thread, or Sliver, is put betwixt a pair or Rowlers, Cillinders, or Cones, or some such movements, which, being twined round by their motion, draws in the Raw Mass of Wooll or Cotton to be spun, in proportion to the velocity given to such Rowlers, Cillinders, or Cones: as the prepared mass passes regularly through or betwixt these Rowlers, Cillinders, or Cones, a succession of OTHER ROWLERS, Cillinders, or Cones MOVEING PROPORTIONABLY FASTER THAN THE FIRST, draw the Rope, Thread, or Sliver, into any degree of fineness which may be required: sometimes these successive Rowlers, Cillinders, or Cones (but not the first) have another Rotation besides that which diminishes the Thread, yarn, or worsted, (viz.
Victor chooses to make the Creature monstrous and huge, because it would be faster and easier from a procedural perspective: "As the minuteness of the parts formed a great hindrance to my speed, I resolved, contrary to my first intention, to make the being of a gigantic stature; that is to say, about seven or eight feet in height, and proportionably large" (Robinson, Frankenstein 77).
In the season of 1795, when, in consequence of the severe frost, the Theatre was for some few weeks only but thinly attended, it was in agitation to perform but half the number of nights in the week; and, consequently, the salaries of Performers to be proportionably reduced' (66).
Grotius wrote that accessories "if they have been the real occasion of loss to any one, or have abetted the person doing him the injury, are so far implicated in the guilt, as to be liable to full damages, or, at least proportionably to the part they have taken.