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Table 1 The baseline characteristics of the primary cohort and the validation cohort

From: A nomogram-based immunoprofile predicts overall survival for previously untreated patients with esophageal squamous cell carcinoma after esophagectomy

  The primary cohort (n = 95) No. of patients (%) The validation cohort (n = 55) No. of patients (%) P-value
Sex    0.579
 Male 68 (71.6) 37 (67.3)  
 Female 27 (28.4) 18 (32.7)  
Age (years)    0.342
 Median 58 59  
 Range 38–81 37–78  
Esophagectomy    0.729
 R0 87 (91.6) 52 (94.5)  
 R1 8 (8.4) 3 (5.5)  
Grade    0.870
 G1 9 (9.5) 4 (7.3)  
 G2 69 (72.6) 40 (72.7)  
 G3 17 (17.9) 11 (20.0)  
T Stage    0.340
 T1a + T1b 14 (14.7) 7 (12.7)  
 T2 30 (31.6) 18 (32.7)  
 T3 33 (33.7) 25 (45.5)  
 T4a 18 (19.0) 5 (9.1)  
N Stage    0.272
 N0 64 (67.4) 29 (52.8)  
 N1 18 (18.9) 13 (23.7)  
 N2 10 (10.5) 11 (20.0)  
 N3 3 (3.2) 2 (3.5)  
TNM Stage    0.656
 IA + IB 20 (21.0) 8 (14.5)  
 IIA + IIB 34 (35.8) 20 (36.4)  
 IIIA+IIIB 32 (33.7) 23 (41.8)  
 IVA 9 (9.5) 4 (7.3)