Table 1.
Clinicopathologic Characteristics of Overall Cohort Divided into Sets
| Characteristic | Training Set, N = 1112a | Test Set, N = 476a | p-valueb |
|---|---|---|---|
| Age (years) | 52 (44, 61) | 52 (46, 61) | 0.400 |
| Comorbidities | 0.700 | ||
| No | 712 (64%) | 300 (63%) | |
| Yes | 400 (36%) | 176 (37%) | |
| BMI (kg/m2) | 0.500 | ||
| Underweight | 61 (5.5%) | 33 (6.9%) | |
| Normal | 529 (48%) | 231 (49%) | |
| Overweight | 510 (46%) | 212 (45%) | |
| Unknown | 12 (1.1%) | 0 (0%) | |
| Stage | 0.200 | ||
| I + II | 635 (57%) | 265 (56%) | |
| III | 440 (40%) | 186 (39%) | |
| IVA | 37 (3.3%) | 25 (5.3%) | |
| Histology | >0.900 | ||
| SCC | 893 (80%) | 381 (80%) | |
| AD | 189 (17%) | 81 (17%) | |
| ASC | 30 (2.7%) | 14 (2.9%) | |
| Tumor size (cm) | 0.200 | ||
| <4 | 430 (39%) | 171 (36%) | |
| 4–8 | 592 (53%) | 251 (53%) | |
| >8 | 38 (3.4%) | 24 (5.0%) | |
| Unknown | 52 (4.7%) | 30 (6.3%) | |
| Modalities | >0.900 | ||
| RT | 121 (11%) | 52 (11%) | |
| CCRT | 991 (89%) | 424 (89%) |
Notes: aMedian (IQR); n (%). bWilcoxon rank sum test; Pearson’s Chi-squared test.
Abbreviations: BMI, body mass index; SCC, squamous cell carcinoma; AD, adenocarcinoma; ASC, adenosquamous carcinoma; RT, radiation alone; CCRT, concurrent chemoradiation.