10 research outputs found

    Concordance between power in logistic regression and slope of power curve given by equation 6.

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    <p>Proportion of scenarios in which observed change in power agreed with predicted slope of chi-square power. The observed change in power is calculated as the sign of the difference of the median likelihood ratio statistic at γca  = 0 and at γca  = 1. 160 parameter values were considered, a subset of the parameter space described in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0063481#pone-0063481-t001" target="_blank">table 1</a>. 500 realizations at γca  = 0 and at γca  = 1 of each combination were undertaken to find the median likelihood ratio statistics.</p

    Empirical power and asymptotic power.

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    <p>Comparison of empirical power (E) to asymptotic (A) for various <i>γ<sub>ca</sub></i> and <i>R</i> = 1 (solid line), <i>R</i> = 2 (dashed), <i>R</i> = 4 (dotted) at two loci that nominally replicate in the gold standard subset. Power is shown as 20<sup>th</sup> percentile of X<sup>2</sup> statistics over 1000 bootstrapped replicates for empirical graphs or as 20<sup>th</sup> percentile of the chi squared distribution for asymptotic graphs, with non-centrality determined from genotypic disease model given in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0063481#pone-0063481-t002" target="_blank">table 2</a>.</p

    Additional file 1: Table S1. of Discovery and replication of SNP-SNP interactions for quantitative lipid traits in over 60,000 individuals

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    Discovery results for all models that passed replication thresholds for MEF analysis. Column header definitions provided at the end. Table S2. Discovery results for all models that passed replication thresholds for Biofilter analysis. Column header definitions provided at the end. (PDF 1649 kb
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