Figure 5From: Performance evaluation of commercial short-oligonucleotide microarrays and the impact of noise in making cross-platform correlationsVenn diagrams of differential expression calls and statistical significance across both microarray platforms. A two-sample two-tailed t-test on normalized log-transformed intensities was performed for each microarray platform. (A) The entire set of 10,763 uniquely common genes between platforms was used to determine the number of statistically significant (p < 0.01) expression ratios. Genes above and below noise were included in the analysis. (B) Statistical significance determined from the set of 2,569 genes which are 'present' on at least 3 arrays in both tissues. Expression values below noise ('absent') were not included in the analysis. (C) Statistical significance determined from the set of 1,760 genes which are 'present' on all 5 arrays in both tissues (i.e. concordantly 'present').Back to article page