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Environ Health Perspect 123:759–765; http://dx.doi.org/10.1289/ehp.1307824 Air pollution affects people every day and especially the elderly, who are a growing population stratum in the United States.
This stratum sampling weight was defined as the ratio between the population stratum size and the observed sample stratum size.
Schools were then selected within each population stratum, again by simple random sampling.
By multiplying up the relevant model coefficients, predicted exposure for any population stratum is obtained.
A strong enforcement of migration policies causing a partial reversal of this immigrant flow, by deportation, could cause a severe drop in household incomes, especially in the poor population stratum.
However, in risk-based screening, the evidence for each population stratum must be assessed in order to reach an aggregate value for the population as a whole.
The relationship between LTC-rates and HD-rates by population stratum and model variations as described by β-values is given in Table 3.
The VIGITEL system did not employ a direct method to compensate for the fraction of households not served by telephone in each city or in each population stratum.
IV Zol also significantly reduced the risk of new hip fractures by 41% at 3 years compared with placebo in the overall patient population (stratum 1 and 2) (Table 2).
Thirty-four articles from 31 studies involving 75,505 participants provided 529 prevalence estimates based on different case definitions and population strata.
Genetic effects are therefore characterized probabilistically by penetrance functions, that is probability distributions of developing cancer by age, given a specific genetic variant, and prevalence functions, that is frequencies of mutation by population strata.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com