life expectancy

(redirected from Mean life span)
Also found in: Dictionary, Thesaurus, Financial, Encyclopedia.

expectancy

 [ek-spek´tan-se]
the expected value or probability of occurrence for a specific event.
life expectancy the number of years, based on statistical averages, that a given person of a specific age, class, or other demographic variable may be expected to continue living.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

life expectancy

n.
The number of years that an individual is expected to live as determined by statistics.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

life expectancy

Longevity, period life expectancy Epidemiology The average length of life of persons in a population; the average number of yrs of life remaining for a population of persons, all of age x, and all subject for the remainder of their lives to the observed age-specific death rates corresponding to a current life table. See Life table.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

life expectancy

A statistical estimate of the number of years a person, of any particular age, is likely to live.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

Patient discussion about life expectancy

Q. what is the life expectancy of a person with chronic bronchioectasis

A. depends on how severe are the infections...how your body reacts to those infections and what is the cause of those infections (cystic fibrosis??). i think only the therapist treating you can estimate. and even so - there are ways to prevent recurring infections. can slow the process of destruction and even stop it completely.

More discussions about life expectancy
This content is provided by iMedix and is subject to iMedix Terms. The Questions and Answers are not endorsed or recommended and are made available by patients, not doctors.
References in periodicals archive ?
Quercetin (200 [micro]M) [32] and EGCG (50 [micro]M) [44] also increased mean life span of mev-l(kn) mutants by 10% and 16% indicating that these flavonoids induce oxidative stress tolerance in C.
- Data for an additional 12 yr allow some refinement of the estimates of disappearance rates of colonies of different age cohorts, and of mean life spans (Table 3 here and in Chew, 1987).
Previous studies (e.g., Promislow 1993) have argued that maximum or mean life span and survivorship are not useful measures of aging, either within or among species.