PTPA and neoplasm: Using the clinical information as reported for the individual studies (GSE15471, GSE16515 and GSE101448: tumor = 1 and non-tumor = 0), we next calculated the Spearman correlation for PP2A gene expression vs clinical disease (tumor), and from it, the mean Spearman correlation (SPmean) and median p. This was also done for gene expression relative to non-tumor (meanDelta 2log-value) (Table 2).