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C-index comparison in TCGA dataset.
| Signature | C-index | Z-score | P-value |
| Our five-gene signature | 0.753 (95% CI = 0.698–0.808) | −3.41016 | 0.000649 |
| Three-gene signature by Zhou et al. (2019) | 0.608 (95% CI = 0.567–0.649) |
C-index, concordance index; CI, confidence interval. All P values in bold were less than 0.05 which were considered statistically significant.
