In order to suppress false results from genes with low overall differential expression, the IR is calculated as weighted sum of p-value ratios: I R = ∑ w i log (p r, i ) ∕ (log (p r, i ) + log (p p, i ) ) ∑ w i where p r, i is the p-value of the residual for gene i, and p p, i is the p-value of principle component projections for differential expression of gene i.
In the initial display the list of targets is sorted by frequency of occurrence and sum of p values across the 10 fps, which defines the target rank (first column).
The optimal cutoff point was defined as the minimum sum of P values from both tests.
In sum, the estimate of p-value for ith SNP is: p ^ l = r B i, R i = r, R i + 1 b + 1, R i < r.
Table 2 Analyses of variances of predictabilities for eight traits and six prediction methods with 20 replications Source DF Sum of Square Mean Square F-test p-value Trait 7 29.2992 4.1856 57,118.62 <.0001 Method 5 0.0302 0.0060 82.35 <.0001 Method×Trait 35 0.0492 0.0019.19.19 <.0001 Residual 912 0.0668 7.33E-05 Fig. 2 Multiple comparisons illustrated by boxplots.
Three studies reported inverse associations between either baseline energy expenditure and change in percent body fat (p<0.05) [22], [22] or accelerometer counts and the sum of skinfolds (p-value for trend = 0.045) [24].
Additionally, the reduced-state alphabets were not applicable to all tree-aware methods, causing the sum of the p-value counts to differ for the tree-aware versus tree-ignorant methods.
For example, the significance of a recurrent abnormality associated with the gene expression in this region is 0.05 if 95% of the time the sum of log (p-value) for the real data is less than that of the permuted data.
For each array, the miRNA probe set signals were compared with the distribution of signals for anti-genomic probes that had matching GC content (miRNA QC Tool, version 1.0.33.0), and in accordance with the recommendation of the manufacturer, Wilcoxon rank-sum test of P value of less than 0.06 was used to identify miRNAs above background.
Based on normality, group means or medians were compared using either a Student's t-test or Wilcoxon Rank Sum test; a p-value of 0.05 was considered nominally significant.
The relative sums of squares are used instead of p-values, because the latter might be violated by deviations from the assumptions.
