cohort

Definitions

  • WordNet 3.6
    • n cohort a group of people having approximately the same age
    • n cohort a band of warriors (originally a unit of a Roman Legion)
    • n cohort a company of companions or supporters
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Webster's Revised Unabridged Dictionary
    • Cohort (Rom. Antiq) A body of about five or six hundred soldiers; the tenth part of a legion.
    • Cohort (Bot) A natural group of orders of plants, less comprehensive than a class.
    • Cohort Any band or body of warriors. "With him the cohort bright
      Of watchful cherubim."
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Century Dictionary and Cyclopedia
    • n cohort In Roman antiquity, an infantry division of the legion, instituted as a regular body by Marius, though the name was used before his time with a less definite Signification. Its original strength was 300 men, but, the cohort becoming the tactical unit of the army, the effective number was raised almost immediately to 500, or perhaps to 600, and remained practically the same until the end of the empire. The name was also given to bodies of auxiliary troops of the same strength, not necessarily organized into legions, and distinguished either according to nationality or according to their arm, as cohortes funditorum, the slingers; cohortes sagittariorum, the bowmen. See legion.
    • n cohort Hence A band or body of warriors in general.
    • n cohort In some systems of botanical and zoölogical classification, a large group of no definitely fixed grade. In zoölogy it is usually intermediate between a family and an order; in botany it is usually a grade next higher than an order, but inferior to a class. Alliance has been used in the botanical sense.
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Chambers's Twentieth Century Dictionary
    • n Cohort kō′hort among the Romans, a body of soldiers from 300 to 600 in number, forming a tenth part of a legion: a band of armed men: any band of men.
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Etymology

Webster's Revised Unabridged Dictionary
L. cohors, prop. an inclosure: cf. F. cohorte,. See Court (n.)
Chambers's Twentieth Century Dictionary
Fr.,—L. cohors, an enclosed place, a multitude enclosed, a company of soldiers.

Usage

In literature:

This soldier is a tried veteran of the Praetorian cohorts.
"If, Yes and Perhaps" by Edward Everett Hale
The schools of the Palatine were the station of the cohorts of the guard.
"The Roman History of Ammianus Marcellinus" by Ammianus Marcellinus
Half-a-dozen of his cohorts sprang up the steps.
"Ralph on the Overland Express" by Allen Chapman
Then up comes Bibulus, determined to be as good as I am; but he loses his whole cohort.
"The Life of Cicero" by Anthony Trollope
The greatest rise occurred in the percents having been incarcerated among the most recent cohorts.
"Prevalence of Imprisonment in the U.S. Population, 1974-2001" by Thomas P. Bonczar
It has always been clear to me why the women turn out in such cohorts to any sort of a function.
"The O'Ruddy" by Stephen Crane
He knew and distrusted Little Thunder and his cohorts.
"The Strollers" by Frederic S. Isham
A Hybrid appears, followed by a vast cohort of players.
"Melomaniacs" by James Huneker
It could not in its whole extent furnish men to fill a Roman cohort.
"Blackwoods Edinburgh Magazine, Volume 59, No. 365, March, 1846" by Various
The cohorts opened to receive Miss Woodruff and Madame von Marwitz enfolded her and stooped to kiss Victor's head.
"Tante" by Anne Douglas Sedgwick
The latter, already tottering, soon fell before the subtle machinations of Hodson and his able cohorts.
"Carmen Ariza" by Charles Francis Stocking
The end was the suicide of Vulteius and his followers, and the surrender of the cohorts on the island.
"The Shores of the Adriatic" by F. Hamilton Jackson
Anyway, Fire Bear's cohorts should be rounded up and imprisoned without delay.
"Mystery Ranch" by Arthur Chapman
In fact, she was one of that cohort of masterless women who are so copiously spread over the Continent.
"The Recipe for Diamonds" by Charles John Cutcliffe Wright Hyne
Small wonder, then, that Aguinaldo and his cohorts considered these fastnesses inaccessible for American troops.
"The Campaign of the Jungle" by Edward Stratemeyer
The cohorts of Cyrus might pray Ormuzd to peer where he glowed.
"The Lords of the Ghostland" by Edgar Saltus
She'll send for shining cohorts and they'll camp round about you.
"Rose MacLeod" by Alice Brown
The cohorts in passing through burned all the dwellings.
"A Captive of the Roman Eagles" by Felix Dahn
Here are the lists of the thirty cohorts, and the contract with the Isaurians.
"A Struggle for Rome, Vol. 2 (of 3)" by Felix Dahn
There were other gods also, a hierarchy of great idle divinities with, beneath them, cohorts of inferior fiends.
"Historia Amoris: A History of Love, Ancient and Modern" by Edgar Saltus
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In poetry:

With truth's bold cohorts, or alone,
He strides through error's field;
His lance is ever manhood's own,
His breast is woman's shield.
"To James Freeman Clarke" by Oliver Wendell Holmes
Prelude
I SEE the boy-bard neath life’s morning skies,
While hope’s bright cohorts guess not of defeat,
And ardour lightens from his earnest eyes,
And faith’s cherubic wings around his being beat.
"Fragments from 'Genius Lost'" by Charles Harpur
The proud king heading the host on his red roan charger.
Dust. On a thicket of spears glares the Syrian sun,
The Saracens swarm to the onset, larger aye larger
Loom their fierce cohorts, they shout as the day were won.
"The Sleep of Sigismund" by Jean Ingelow
Legate, I come to you in tears—My cohort ordered home!
I've served in Britain forty years. What should I do in Rome?
Here is my heart, my soul, my mind—the only life I know.
I cannot leave it all behind. Command me not to go!
"The Roman Centurion's Song" by Rudyard Kipling
'Twas evening, and the wintry white
Glistened beneath the star-lit sky — Forth marched the British cohorts right
Through Boston's streets, there to defy
The gathered sons of Freedom's cause,
And taunt them with Oppression's laws.
"Crispus Attacks" by George Hannibal Temple
But when April at last shall put to flight
The pallid cohorts of the lingering snow,
And every leaf lifts upward to the light,
And every spirit blossoms from its woe,
Ah, then relent, and let me have my share
Of joy, and rise up radiant from care.
"XIX. "Although the spring is hastening to pursue"" by Robert Silliman Hillyer

In news:

Schedule a Chinese tea ceremony with some of your loving cohorts.
Researchers in the University of Georgia College of Education are currently seeking third- and fifth-grade classroom teachers to participate in the second cohort of their Instructional Conversation teaching strategy study.
Along with NYC cohorts Nas and B.I.G.
Women who take oral contraceptives and smoke cigarettes have an increased risk of ulcerative colitis , according to two large cohort studies.
Startup accelerators are on the rise, as would-be entrepreneurs are jumping at the chance to land one of the coveted positions within these cohort-based incubators.
In a previous analysis of participants in the cohort, high IQ scores at 10 years were associated with an increased risk for excessive alcohol intake and frequent drinking episodes as an adult .
Nursing and dental students will move through the program as a cohort and take classes on integrated professional work.
" She described the program and NBVC's role, "Students elect to be a part of the program their 10th grade year and, as a cohort, take classes designed with a...
He beat out his 'The Only Way I Know' cohorts Jason Aldean and Eric Church for the prize, which was presented by Lady Antebellum.
Al Messerschmidt/Getty ImagesEven Chargers fans might welcome Ed Hochuli's return, along with his union cohorts.
But we applaud David E Kelley and his cohorts for not giving up on it just yet.
Of Snooki and her "Jersey Shore" cohorts have inspired a proposed new law in the Garden State .
Generation Y ( Gen Y) most commonly refers to the demographic cohort born in the 1980s to mid-'90s.
Long-time cohorts will say goodbye this May.
Undecided voters are a tiny cohort that may not matter in the end .
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In science:

Pseudo-likelihood type (inefficient) estimators have been proposed by Prentice (1986) for case-cohort designs, and by Borgan, Langholz, Samuelsen, Goldstein and Pogoda (2000) for exposure stratified case-cohort designs.
Information bounds for Cox regression models with missing data
The censoring time is distributed with point mass 1 at t = 1, which means that all sub jects in the cohort are followed from time zero to either failure or to the end of the study at t = 1.
Information bounds for Cox regression models with missing data
In the i.i.d. version of the case-cohort study, a simple random subsample is taken from the nonfailures with sampling (inclusion) probability π0 .
Information bounds for Cox regression models with missing data
In a classical case-cohort design, Y may not be observed if the sub ject is not a failure and not in the subcohort.
Information bounds for Cox regression models with missing data
Figure 1 displays the ratios of asymptotic variance of the Self and Prentice (1988) pseudo-likelihood estimator (SP Variance) to the information lower bound for θ as a function of the sampling fraction for nonfailures in the i.i.d. case-cohort model shown above.
Information bounds for Cox regression models with missing data
Asymptotic relative efficiency of the optimal ly efficient estimator in the case-cohort design relative to the optimal ly efficient estimator in the ful l cohort design as a function of θ (log of relative risk ) for different baseline failure probabilities P (T ≤ 1|Z = 0).
Information bounds for Cox regression models with missing data
We suppose that V can be observed for everyone in the entire cohort, but X is only observed for sub jects in the subcohort and failures.
Information bounds for Cox regression models with missing data
The i.i.d. version of the exposure stratified case-cohort design studied by Borgan, Langholz, Samuelsen, Goldstein and Pogoda (2000) is a special case of this model.
Information bounds for Cox regression models with missing data
All sub jects in the cohort are followed from time zero to either failure or to the end of the study at time t = 1.
Information bounds for Cox regression models with missing data
Asymptotic efficiency of the optimal ly efficient estimator for the case-cohort design with a surrogate variable, relative to that for the ful l cohort design, as a function of the baseline failure probability, P (T ≤ 1|X = 0).
Information bounds for Cox regression models with missing data
Comparisons of asymptotic relative efficiency (ARE relative to a ful l cohort study ): the approximate AREs of pseudo-likelihood estimators and the AREs of information bounds for a stratified case-cohort design, which has only the binary covariate of interest, X, and a binary covariate V , which is a surrogate for X.
Information bounds for Cox regression models with missing data
Case-cohort and case-control analysis with Cox’s model.
Information bounds for Cox regression models with missing data
Prentice, R. L. (1986). A case-cohort design for epidemiologic cohort studies and disease prevention trials.
Information bounds for Cox regression models with missing data
Asymptotic distribution theory and efficiency results for case-cohort studies.
Information bounds for Cox regression models with missing data
Dietary intake of folic acid and colorectal cancer risk in a cohort of women.
Information bounds for Cox regression models with missing data
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