Kaplan–Meyer plots of 5q33 and IL-12 groups in ERBB2 tumors. The training set consisted of 196 tumors with high ERBB2 expression (A and E) and 1,043 tumors with low ERBB2 expression (B and F). The test set contained 70 tumors with the highest ERBB2 expression (C and G) and 277 tumors with lowest ERBB2 expression (D and H). The score is calculated for each sample as the mean standardized expression values for all genes in the gene set. The low score group was defined as the third of samples with lowest score for the indicated gene set, and the high score group was defined as the third of the samples with the highest score. The middle third was excluded from the analysis. The P-values were calculated using the log-rank test.
Abbreviation: IL, interleukin.