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Table 1 Characteristics of esophageal cancer patients grouped by pathologic N status in patients with pathologic complete response of primary tumors

From: Residual lymph node status is an independent prognostic factor in esophageal squamous cell Carcinoma with pathologic T0 after preoperative radiotherapy

Characteristic Total n = 100 ypT0N0 n = 78 ypT0N1 n = 22 P-value
Gender     0.973
Male(ref) 77 (77.0) 60 (76.9) 17 (77.3)  
Female 23 (23.0) 18 (23.1) 5 (22.3)  
Age(year     0.746
<65 89 (89.0) 69 (88.5) 20 (90.9)  
≥65 11 (11.0) 9 (11.5) 2 (9.1)  
The length(cm)     0.321
<6 41 (41.0) 34 (43.6) 7 (31.8)  
≥6 59 (59.0) 44 (56.4) 15 (68.2)  
The location     0.323
Upper 34 (26.0) 23 (29.5) 3 (13.6)  
Middle 63 (63.0) 47 (60.3) 16 (72.7)  
Lower 11 (11.0) 8 (10.3) 3 (13.6)  
Clinical T stagea     0.729
T2 34 (34.0) 25 (32.1) 9 (40.9)  
T3 52 (52.0) 42 (53.8) 10 (45.5)  
T4a 14 (14.0) 11 (14.1) 3 (13.6)  
Clinical N stagea     0.461
N0(ref) 70 (70.0) 56 (71.8) 14 (63.6)  
N1 30 (30.0) 22 (28.2) 8 (36.4)  
Clinical stagea     0.791
Stage II 66 (66.0) 52 (66.7) 14 (63.6)  
Stage III 34 (34.0) 26 (33.3) 8 (36.4)  
Surgery     0.521
Lvor-Lowis ooproperation 64 (64.0) 48 (61.5) 16 (72.7)  
Mckeown 36 (36.0) 30 (38.5) 6 (27.3)  
Local recurrences     0.418
yes 17 (17.0) 12 (12.0) 5 (22.7)  
no 83 (83.0) 66 (66.0) 17 (77.3)  
  1. Data are expressed as n (%) unless otherwise specified
  2. AJCC American Joint Committee on Cancer, LNs lymph nodes, SD standard deviation
  3. a AJCC 2002 staging system