Table 1 Clinical characteristics of the training and validation cohorts
| Â | The training cohort | The validation cohort | ||
|---|---|---|---|---|
Resectable (n = 189) | Unresectable (n = 224) | Resectable (n = 81) | Unresectable (n = 97) | |
Median age (years) | 52.8 | 65.8 | 58.8 | 62.6 |
Gender (%) | ||||
 Male | 143 (75.6) | 147 (65.6) | 61 (75.3) | 70 (72.1) |
 Female | 46 (24.4) | 77 (34.4) | 20 (24.7) | 27 (27.9) |
Location of the tumour (%) | ||||
 Upper thoracic segment | 14 (7.6) | 13 (5.6) | 4 (4.9) | 5 (5.2) |
 Middle thoracic segment | 135 (71.2) | 155 (69.2) | 60 (74.5) | 50 (51.2) |
 Lower thoracic segment | 40 (21.2) | 56 (25.2) | 17 (20.6) | 42 (43.6) |
Cigarette Smoking (%) | ||||
 Yes | 115 (60.8) | 154 (68.8) | 59 (72.8) | 66 (68.0) |
 No | 74 (39.2) | 70 (31.2) | 22 (27.2) | 31 (32.0) |
History of alcohol use (%) | ||||
 Yes | 94 (49.7) | 134 (59.8) | 51 (63.0) | 63 (65.0) |
 No | 95 (50.3) | 90 (40.1) | 30 (37.0) | 34 (35.0) |
Family History (%) | ||||
 Yes | 85 (45.0) | 150 (67.0) | 35 (43.2) | 58 (59.8) |
 No | 104 (55.0) | 74 (33.0) | 46 (56.7) | 39 (40.2) |