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 ?
Variability was highest in the least fit group while quartile 4 (most fit) showed the least amount of heart rate variability.
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.
A post-hoc analysis of a prospective RCT (the Diabetes Prevention Program) comprising 3081 patients with impaired glucose metabolism who received metformin, a lifestyle modification program, or no intervention (placebo) found that metformin reduced the risk of developing diabetes only for patients in the highest risk quartile over 2.8 years.
Figure 6 is a summary of the marginal S[O.sub.2] emissions associated with a marginal increase in generation across price-spread quartiles and NYC load deciles.
The performance of the candidate's top quartile in an event was assessed with respect to other events using:
After accounting for the within-person variability of weight change, we found no significant association between sex specific baseline trait anxiety score quartiles and weight change over time in this multiethnic cohort of adults without established clinical CVD at baseline.
The relationship holds for Belgium, the Czech Republic, Estonia, Hong Kong, Hungary, Ireland, Panama, Singapore, Sweden and Switzerland, which are in the first (top) quartiles for both the FDI Contribution Indexes and the IFDI stock-to-GDP ratios.
Exercise was queried as frequency and duration of minimal, moderate and strenuous exercise, as defined by Godin, with MET-based exercise scores divided into quartiles. (14) For both the validated dietary screener for fruit and vegetable consumption, and the cumulative personal health index (PHI), responses were ranked by quartile.
In the underlying indices, STOXX has mapped each of the ICB sub-sectors to one of the Market Quartiles:
In order to capture the nonlinear nature of this relationship, for each good, the sample distribution of the number of positive reports held by the seller in each auction is divided into quartiles, and dummy variables are created that indicate whether an auction falls into each quartile.
Each characteristic was scored in quartiles, with quartile 1 being the lowest complexity.