Sentence examples for per strata from inspiring English sources

Rates for CV death and overall mortality per strata were 3.1%and4.8%8% (no/trace albuminuria); 5.8% and 9.0% (microalbuminuria); and 7.7% and 12.6% (macroalbuminuria) at 2 years of follow-up.

Four intervention carry-outs were randomly selected per strata.

The total deaths per strata of individual and medical factors are described in Supplementary file 1.

The computed sample size per strata was 254 adjusting for non-response.

This stratified approach is sensitive to the unit number per strata and to the number of strata: the accuracy of the regression coefficients decreases for a small number of units per strata and/or many numbers of strata [ 27].

Bootstrap consists in randomly sampling the population using a similar fraction per strata in the resampled sets [ 29].

To reduce the sampling effort, the initial selection of points is viewed as the first phase of sampling and a subsample of these points is selected in a second phase by means of one-per-stratum stratified sampling (OPSS).

The use of one-per-stratum stratified sampling provides relevant improvement with respect to the use of simple random sampling without replacement.

We have investigated the efficiency of one-per-stratum stratified sampling for selecting segments and pixels, where to carry out manual classification and to determine the efficiency of the difference estimator for exploiting auxiliary information at the estimation level.

From the results of a recent wide investigation (Fattorini et al. 2015), the so-called one-per stratum stratified sampling (OPSS) seems to be a suitable spatial scheme, accomplishing simplicity and efficiency, compared to other schemes investigated.

However, that model is not adapted to our particular context of a large number of strata, with very small sample size per stratum (in our work, a stratum is a pair), thus it will not be studied here.