Table 1.
Clinical characteristics of the study populations.
| Characteristics | TCGA-ESCA (n = 165) | GSE13937 (n = 76) |
| Age | ||
| <60 | 75 (45.5%) | / |
| ≥60 | 90 (54.5%) | / |
| Sex | ||
| Female | 27 (16.4%) | / |
| Male | 138 (83.6%) | / |
| Smoking history | ||
| Yes | 96 (58.2%) | 58 (76.3%) |
| No | 51 (30.9%) | 14 (18.4%) |
| Unknown | 18 (10.9%) | 4 (5.3%) |
| Alcohol history | ||
| Yes | 116 (70.3%) | 57 (75.0%) |
| No | 48 (29.1%) | 13 (17.1%) |
| Unknown | 1 (0.6%) | 6 (7.9%) |
| Histopathology | ||
| EADC | 82 (49.7%) | 32 (42.1%) |
| ESCC | 83 (50.3%) | 44 (57.9%) |
| TNM stage | ||
| 0 | 0 (0.0%) | 14 (18.4%) |
| I | 17 (10.3%) | 11 (14.5%) |
| II | 76 (46.1%) | 31 (40.8%) |
| III | 52 (31.5%) | 10 (13.2%) |
| IV | 15 (9.1%) | 10 (13.2%) |
| Unknown | 5 (3.0%) | 0 (0.0%) |
| Chemoradiation therapy | ||
| Yes | 75 (45.5%) | 39 (51.3%) |
| No | 77 (46.7%) | 37 (48.7%) |
| Unknown | 13 (7.9%) | 0 (0.0%) |