Table 1 Clinical characteristics of ESCC patients in the training cohort and independent cohort
Characteristic | Training cohort | Independent cohort |
|---|---|---|
Age | ||
 ≤ 59 | 66 (46.8%) | 54 (52.4%) |
 > 59 | 75 (53.2%) | 49 (47.6%) |
Gender | ||
 Male | 112 (79.4%) | 74 (71.8%) |
 Female | 29 (20.6%) | 29 (28.2%) |
Tobacco use | ||
 Yes | 95 (67.4%) | 66 (64.1%) |
 No | 46 (32.6%) | 37 (35.9%) |
Alcohol use | ||
 Yes | 61 (43.3%) | 40 (38.8%) |
 No | 80 (56.7%) | 63 (61.2%) |
Tumor location | ||
 Upper | 13 (9.2%) | 8 (7.8%) |
 Middle | 95 (67.4%) | 65 (63.1%) |
 Lower | 33 (23.4%) | 30 (29.1%) |
Tumor size | ||
 ≤ 4 | 92 (67.3%) | 63 (61.2%) |
 > 4 | 47 (33.3%) | 40 (38.8%) |
N stage | ||
 N0 | 66 (46.8%) | 64 (62.1%) |
 N1 | 45 (31.9%) | 22 (21.4%) |
 N2 | 20 (14.2%) | 13 (12.6%) |
 N3 | 10 (7.1%) | 4 (3.9%) |
TNM stage | ||
 I | 4 (2.8%) | 10 (9.7%) |
 II | 73 (51.8%) | 57 (55.3%) |
 III | 64 (45.4%) | 36 (35.0%) |