In our analysis, we stratify the complexes into large and small complexes, and further stratify the large complexes into low, medium, and high DENS (corresponding to DENS of [ 0,.35], (.35,.7], and (.7,1] respectively), and low and high EXT (corresponding to EXT ≤3 and >3 respectively), to give seven total strata (one for small complexes, and six for large complexes).
We used gender and sample country of origin (US versus EU, total 6 stratum) as covariates in the model to account for possible population heterogeneity.
Inner-city, low-income children have the highest prevalences of PbB levels above this criterion level, but sizable numbers of all strata of children have elevated PbB levels when considering both base populations and prevalences for the specific strata (total of 30 strata).
The OR to die within follow-up for patients in the higher of two total AP strata was 2.70 (95% CI 1.76 to 4.15).
In total eighteen strata were formed by gender, previous injury (no injuries, injury 3 till 12 months ago and injuries longer then 12 months ago) and sporting activities (no, with axial load and without axial load).
Kaplan-Meier studies yielded strong and significant patterns of associations between total AP strata and survival both from median and first laboratory test (Logrank 19.8 and 27.5, respectively, p<0.0001) and from dialysis start (figure 3A,B).
We hypothesised that the ratio between benefits and harms of screening in the screened Gothenburg group compared with the unscreened Malmö group would be superior in the group of men with the highest risk of prostate cancer mortality compared with the lower risk groups, by strata of baseline total PSA level.
The goal of this algorithm was to minimize the variation covered within a given strata while reducing the total number of strata.
Two female pilots formed their own strata, resulting in a total of 13 strata that were numbered consecutively.
Population estimates are based on the sum of the product of the known total area, the stratum weight, and the mean difference in standing dead biomass at the plot level for each species and stratum level [22].
