Exact(30)
To control for confounding variables associated with differences among centers, he compared analyses that included variation across centers with analyses comparing classrooms within centers.
There is little known about nurses' attitudes toward older people in Turkish society, particularly within centers providing care to older patients.
Within centers, there is also perfect clustering by sex, and there is a reasonably good pairing of samples of the same strain within sexes.
At lesion edges and within centers of lesions, iron accumulated in astrocytes and axons.
A central randomization system was used, assigning participants within centers in blocks of four.
If all the variation occurs within centers (σ b 2 = 0 ), then the ICC = 0.
Similar(30)
However, the exposure to S in both PM2.5 and PM10 varied less within centers than between centers, and the ratio between-center variance divided by the within-center variance of exposure was higher than the ratio values of all other components and particle mass (see Supplemental Material, Table S2).
For particle mass, especially for PM2.5, the within-center and between-center ORs were similar.
After initial within-center analyses, the results were combined across centers using random effects meta-analysis.
Both between-center genotyping concordance and within-center blinded quality control concordance were above 99%.
For Zn, the between-center effects were stronger than the within-center effects.
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