quartile


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quartile

 [kwor´tīl]
any of the three values that divide the range of a probability distribution into four parts of equal probability; the first, second, and third quartiles are the 25th, 50th, and 75th percentiles.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
References in periodicals archive ?
Fitness status quartiles within the competitive cyclists were established through V[O.sub.2] max.
The conditional estimates reported in the lower panel of the table clearly support a nonlin-early heterogeneous association, as all estimates of the growth-inequality association are significantly larger in the fourth quartile of economic freedom.
Subjects were divided equally into four groups (quartiles) based on thyroid laboratory testing as follows: thyroid-stimulating hormone (TSH, [mu]IU/mL) quartiles, Q1 (TSH < 1.30), Q2 (1.30 [less than or equal to] TSH <1.90), Q3 (1.90 [less than or equal to] TSH < 2.75), and Q4 (TSH [greater than or equal to] 2.75); free thyroxine (free T4, ng/dL) quartiles, Q1 (free T4 < 1.15), Q2 (1.15 [less than or equal to] free T4 < 1.26), Q3 (1.26 [less than or equal to] free T4 < 1.38), and Q4 (free T4 [greater than or equal to] 1.38); and triiodothyronine (T3, pg/mL) quartiles, Q1 (T3 < 2.87), Q2 (2.87 [less than or equal to] T3 < 3.12), Q3 (3.12 [less than or equal to] T3 < 3.40), and Q4 (T3 [greater than or equal to] 3.40).
Of the 428 equity funds in the bottom quartile, 18.7% moved to the top quartile over a five-year horizon, while 27.8% of funds in the top quartile moved to the bottom quartile during that same period.
Metformin reduced the rate of developing diabetes only among patients in the highest risk quartile, whose mean 3-year diabetes risk averaged 60% (placebo rate=59.6%; metformin rate=38.2%; mean absolute risk reduction [ARR]=21.4%; 3-year number needed to treat [NNT]=4.6).
Quartile 1 of fuel price spreads, in which natural gas is relatively more expensive, has by far the lowest megawatt-hour increase in generation.
Those in the top quartile had a greater lung capacity (FVC) and could exhale more air in one second (FEV1) than those in the lowest quartile.
The methodology for this study consisted of binning every event in every year into quartiles and then analyzing the results of the top quartile in each event.
Women with higher binding inhibitory capacity at delivery were less likely to deliver LBW babies (odds ratio <1 for all quartiles in comparison to first quartile; p = 0.028).
The percentage with debt also was also higher for those with higher family incomes across each survey year, except in 2013 when the percentage decreased at the highest-income quartile.