Table 2. Association between risk score of the five-IRG signature and patients' clinical characteristics.
| Variables | Entire TCGA set n (%) | Risk score | P value | |
| Low | High | |||
| Age (mean ± SD, years) | 60.5 ± 12.2 | 59.9 ± 12.7 | 61.0 ± 11.7 | 0.347 |
| Gender | 4.777e-05 | |||
| Male | 337 (65.6) | 135 (40.1) | 202 (59.9) | |
| Female | 177 (34.4) | 105 (59.3) | 72 (40.7) | |
| Stage | 1.008e-09 | |||
| I | 258 (50.2) | 155 (60.1) | 103 (39.9) | |
| II | 54 (10.5) | 21 (38.9) | 33 (61.1) | |
| III | 120 (23.3) | 47 (39.2) | 73 (60.8) | |
| IV | 82 (16.0) | 17 (20.7) | 65 (79.3) | |
| Grade | 1.066e-10 | |||
| G1 | 13 (2.5) | 11 (84.6) | 2 (15.4) | |
| G2 | 224 (43.6) | 133 (59.4) | 91 (40.6) | |
| G3 | 204 (39.7) | 83 (40.7) | 121 (59.3) | |
| G4 | 73 (14.2) | 13 (17.8) | 60 (82.2) | |