Table 1 Comparison of patients’ characteristics between training cohort and validation cohort
Variables | Training cohort (n = 155) | Validation cohort (n = 66) | χ2/t | p |
|---|---|---|---|---|
Age (years), Mean ± SD | 65.7147 ± 9.74 | 64.73 ± 10.16 | 0.678 | 0.499 |
Gender | 0.342 | 0.559 | ||
Male | 116 (74.8) | 45 (68.2) | ||
Female | 39 (25.2) | 21 (31.8) | ||
Tumor location | 5.814 | 0.121 | ||
Cervical | 6 (3.9) | 8 (12.1) | ||
Upper thoracic | 34 (21.9) | 16 (24.2) | ||
Middle thoracic | 91 (58.7) | 33 (50.00) | ||
Lower thoracic | 24 (15.5) | 9 (13.6) | ||
T stage | 3.193 | 0.363 | ||
T1 | 2 (1.3) | 0 (0) | ||
T2 | 11 (7.1) | 9 (13.6) | ||
T3 | 66 (42.6) | 27 (40.9) | ||
T4 | 76 (49.0) | 30 (45.5) | ||
N stage | 1.856 | 0.603 | ||
N0 | 20 (12.9) | 13 (19.7) | ||
N1 | 70 (45.2) | 28 (42.4) | ||
N2 | 55 (35.5) | 22 (33.3) | ||
N3 | 10 (6.5) | 3 (4.5) | ||
Clinical stage | 3.152 | 0.369 | ||
I | 2 (1.3) | 0 (0) | ||
II | 15 (9.7) | 11 (16.7) | ||
III | 88 (56.8) | 37 (56.1) | ||
Iva | 50 (32.3) | 18 (27.3) | ||
Radiation dose, Median (range) | 64 (60–66) | 64 (60–66) | − 0.920 | 0.358 |
LDH group | 1.282 | 0.258 | ||
High | 88 (56.8) | 32 (48.5) | ||
Normal | 67 (43.2) | 34 (51.5) | ||
NLR, Median (range) | 2.73 (1.96–3.71) | 2.76 (2.00–3.63) | − 0.448 | 0.654 |
PLR, Median (range) | 137.78 (100.56–181.43) | 138.87 (101.31–182.26) | − 0.344 | 0.731 |
CR ratio | 52 (33.5) | 26 (39.4) | 0.693 | 0.405 |
Rad-score, Mean ± SD | − 0.0289 ± 0.35 | − 0.058 ± 0.538 | 0.474 | 0.636 |