Feature | Training group (n = 162) | Test group (n = 140) | ||||
---|---|---|---|---|---|---|
Low (n = 120) | High (n = 42) | p | Low (n = 102) | High (n = 38) | p | |
Gender | ||||||
 Male | 89 (74.2) | 28 (66.7) | 0.35 | 65 (63.7) | 26 (68.4) | 0.60 |
 Female | 31 (25.8) | 14 (23.3) | 37 (36.3) | 12 (31.6) | ||
Agea | ||||||
  < 60 y | 45 (37.8) | 15 (35.7) | 0.81 | 43 (42.2) | 16 (42.1) | 1.00 |
  ≥ 60 y | 74 (62.2) | 27 (64.3) | 59 (57.8) | 22 (57.9) | ||
Tumor sizea | ||||||
  < 5 cm | 74 (31.7) | 29 (48.5) | 0.39 | 69 (69.0) | 28 (73.7) | 0.59 |
  ≥ 5 cm | 46 (68.3) | 13 (51.5) | 31 (31.0) | 10 (26.3) | ||
Tumor stage | ||||||
 T1 + T2 | 90 (75.0) | 35 (83.3) | 0.27 | 79 (77.5) | 33 (86.8) | 0.22 |
 T3 + T4 | 30 (25.0) | 7 (16.7) | 23 (22.5) | 5 (13.2) | ||
Histological type | ||||||
 Adenocarcinoma | 63 (52.5) | 24 (57.1) | 0.60 | 59 (57.8) | 17 (44.7) | 0.17 |
 Squamous cell carcinoma | 57 (47.5) | 18 (41.9) | 43 (42.2) | 21 (55.3) | ||
Histological gradea | ||||||
 Well/moderate | 88 (73.3) | 27 (64.3) | 0.27 | 57 (61.3) | 30 (78.9) | 0.05 |
 Poor/NS | 32 (26.7) | 15 (35.7) | 36 (38.7) | 8 (21.1) | ||
Lymph node metastasisa | ||||||
 Negative | 49 (51.6) | 32 (80.0) | 0.002 | 58 (59.8) | 33 (86.8) | 0.003 |
 Positive | 46 (48.4) | 8 (20.0) | 39 (40.2) | 5 (18.5) | ||
TNM stagea | ||||||
 I + II | 58 (49.6) | 36 (87.8) | 0.000 | 61 (60.4) | 34 (89.5) | 0.001 |
 III + IV | 59 (50.4) | 5 (12.2) | 40 (39.6) | 4 (10.5) |