Supplementary Figure 7.

The nine-gene signature stratifies high- and low-risk groups of prostate cancer patients with respect to recurrence. (A) Scores of the nine-gene signature were assigned to individual patients based on the formula ∑(f_i)n, (f_i: Cox coefficient of individual factors, n = 9) (see Supplementary Table 4 for details). ROC curve was constructed using the pROC package in R. The data set used is the TCGA within cBioPortal. (B, C) Based on the scores (Supplementary Table 4), the median (B) and Q3 scores (C) was used to stratify patients into high-risk (score positive) and low-risk groups (score negative), which were analyzed for the associated DFS times (Kaplan-Meier curve and log-rank test) using R statistics.