Table 1 Comparison of patients’ characteristics between training set and test set
Variables | Training set (n = 160) | Validation set (n = 66) | χ2/t | P |
|---|---|---|---|---|
Age (years), mean ± SD | 65.12 ± 10.22 | 66.20 ± 9.23 | − 0.741 | 0.459 |
Gender | 0.004 | 0.951 | ||
Male | 117 (73.1) | 48 (72.7) | ||
Female | 43 (26.9) | 18 (27.3) | ||
Tumor location | 1.120 | 0.772 | ||
Cervical | 10 (6.3) | 4 (6.1) | ||
Upper thoracic | 39 (24.4) | 12 (18.2) | ||
Middle thoracic | 87 (54.4) | 40 (60.6) | ||
Lower thoracic | 24 (15.0) | 10 (15.2) | ||
T stage | 1.362 | 0.715 | ||
T1 | 1 (0.6) | 1 (1.5) | ||
T2 | 16 (10.0) | 4 (6.1) | ||
T3 | 65 (40.6) | 29 (43.9) | ||
T4 | 78 (48.8) | 32 (48.5) | ||
N stage | 0.522 | 0.914 | ||
N0 | 23 (14.4) | 11 (16.7) | ||
N1 | 71 (44.4) | 27 (40.9) | ||
N2 | 54 (33.8) | 24 (36.4) | ||
N3 | 12 (7.5) | 4 (6.1) | ||
Clinical stage | 1.759 | 0.624 | ||
I | 1 (0.6) | 1 (1.5) | ||
II | 17 (10.6) | 10 (15.2) | ||
III | 92 (57.5) | 33 (50.0) | ||
Iva | 50 (31.3) | 22 (33.3) | ||
Radiation dose, median (range) | 64 (60–66) | 64 (60–66) | − 0.630 | 0.529 |
Chemotherapy regimen | 1.580 | 0.209 | ||
PF | 113 (68.5) | 52 (31.5) | ||
TP | 47 (77.0) | 14 (23.0) | ||
LDH group | 3.189 | 0.074 | ||
High | 79 (50.6) | 42 (63.6) | ||
Normal | 81 (49.4) | 24 (36.4) | ||
NLR, median (range) | 2.73 (2.00–3.71) | 2.82 (1.82–3.71) | − 0.149 | 0.882 |
PLR, median (range) | 134.49 (102.43–176.55) | 144.47 (96.72–196.38) | 0.571 | 0.568 |
CR ratio | 56 (35.0) | 22 (33.3) | 0.057 | 0.811 |
Rad-score, mean ± SD | − 16.1105 ± 4.03384 | − 15.8565 ± 3.69877 | − 0.441 | 0.660 |