This measure is a modification of the Phi Coefficient (a standard measure of association for 2 × 2 contingency tables), allowing it to be used in the comparison of variables of different numbers of categories (although it should only be done in relative, not absolute terms), and in the analysis of contingency tables larger than 2 × 2 (Siegel and Castellan 1988).
The correlation coefficient is a standard measure of association between two random variables and is widely used in epidemiology.
Statistical procedures such as simple descriptive statistics (means, standard deviations, and proportions), measure of association like chi-square test, and binary logistic regression models were employed for the data analysis.
Third, if a SNP has no main effect on the phenotype, but has an epistatic effect along with another factor, then this SNP is not associated (according to the standard concept of association), but strongly relevant to the phenotype (i.e. it is in pure interaction with the phenotype).
Over the past few months, the N.R.A. has released a succession of Web videos, all strikingly bellicose even by the standards of the association.
The sample size was large, even by the standards of genetic association studies.
We compared performance of our method with that of two standard tests of association, one ignoring gene-gene/gene-environment interactions and the other based on a saturated model of interactions.
For the analysis of multi-locus LD among the 11 widely separated microsatellites, the standard index of association (ISA), was calculated and tested for departure from random allelic association using LIAN 3.0 software [31].
The standard error of association statistics for IMT may be incorrectly estimated because of non-normality of the IMT distributions.
The study was powered to examine the association between MR and TTP status using standard tests of association (Pearson's χ test of association, Fisher' exact test).
