Comparing Mammographic Measures Across Populations

Comparing mammographic measures across populations.

Mammography reveals wide variation among women in the composition and structure of the breast, reflecting the cumulative effects of genetic and environmental exposures that may also play roles in breast carcinogenesis (1,2). Mammographic density (MD), one measure of the characteristics of the image, reflects the relative representation of radiodense epithelial and stromal tissues and radiolucen...

New methods for comparing literacy across populations

Comparing excess costs across multiple corporate populations.

The purpose of this study was to examine the relationship of health risk level to charged medical costs and determine the excess cost of higher risk individuals compared to low risk. Two years of medical claims from six corporations were used to determine costs of health risk assessment (HRA) participants and nonparticipants. A total of 165,770 employees, 21,124 of which took an HRA, were used ...

Empirical Bayes Estimators with Uncertainty Measures for NEF-QVF Populations

The paper proposes empirical Bayes (EB) estimators for simultaneous estimation of means in the natural exponential family (NEF) with quadratic variance functions (QVF) models. Morris (1982, 1983a) characterized the NEF-QVF distributions which include among others the binomial, Poisson and normal distributions. In addition to the EB estimators, we provide approximations to the MSE’s of t...

Comparing Resemblance Measures∗

In the paper some types of equivalences over resemblance measures and some basic results about them are given. Based on induced partial orderings on the set of unordered pairs of units a dissimilarity between two resemblance measures over finite set of units can be defined. As an example, using this dissimilarity standard association coefficients between binary vectors are compared both theoret...