stratification


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Related to stratification: gender stratification

stratification

 [strat″ĭ-fĭ-ka´shun]
arrangement in layers.

strat·i·fi·ca·tion

(strat'i-fi-kā'shŭn),
The process or result of separating a sample into subsamples according to specified criteria such as age or occupational groups.
[L. stratum, layer, + facio, to make]

stratification

The grouping of subjects/patients based on key prognostic factors measured at baseline.

strat·i·fi·ca·tion

(strat'i-fi-kā'shŭn)
The process or result of separating a sample into subsamples according to specified criteria, such as age or occupational group.
[L. stratum, layer, + facio, to make]

stratification

a process in which certain seeds are subjected to low temperatures for a period of time, in order for GERMINATION to take place. Natural stratification occurs when seeds are shed in autumn and become covered with soil, leaves, etc. during the winter. The process can be reproduced artificially by alternating layers of seeds with layers of moistened substrate such as sphagnum moss and storing at a low temperature.

stratification

1. arrangement in layers.
2. in statistical terms the division of a population into subpopulations on the basis of specified criteria such as age, breed, parity. See stratified random sample.
References in periodicals archive ?
Improved management of patients with heart failure (HF), pneumonia (PN), and atrial myocardial infarction (AMI) was another frequently reported success related to risk stratification, respondents noted.
To evaluate the initial germination and possible effect of storage at room temperature, a batch of seeds was germinated at 25/10[degrees]C without cold stratification or [GA.
A PubMed search was conducted to identify original or review articles addressing pre-treatment assessment of prognostic factors and risk stratification in prostate cancer from 1966 to the present.
The inclusion of extra-biblical materials is also very useful not only for comparative purposes, but also as a further indication of social trends, the continuance of social stratification as a factor, and the development of marriage practices into the post-biblical era.
Presumably, better stratification would increase the precision of population estimates and increase the power to detect population trends (Lenarz et al.
increasing [eta], implies the likelihood of reduced stratification in the room, and this, in turn, implies a reduction in the ventilation effectiveness of the system.
For warm stratification, we placed seeds in a sand mixture at 20-30[degrees]C for 2 weeks.
A theory of stratification for coatings that contain solutions of binary mixtures of polymers was elaborated on for a wide range of binders.
The purpose of the ACSM risk stratification system is to identify individuals with medical conditions that should be excluded from exercise or who require medical clearance and/or medically supervised exercise programs.
The researches was observed that thermal energy reservoir tanks with daily period are one of main parts of domestic solar thermal systems which was existed more attention for numerous studies about thermal impact assessment, development stratification and analyzing about nourish and discharge periods is available [15-18].