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Table 1 Baseline characteristics of patients grouped by surgical approach

From: Right versus left transthoracic approach for lymph node-negative esophageal squamous cell carcinoma

Characteristic Left transthoracic approach (n = 545) Right transthoracic approach (n = 150) P
Sex    0.995
 Male 386 (70.6 %) 106 (70.7 %)  
 Female 159 (29.4 %) 44 (29.3 %)  
Average age 55.66 ± 9.85 56.91 ± 8.42 0.192
Smoking history 324 (59.4 %) 89 (59.3 %) 0.980
Drinking history 109 (20.0 %) 28 (18.7 %) 0.716
Preoperative hemoglobin 134.33 ± 18.65 132.49 ± 17.38 0.222
Preoperative FEV1 2.42 ± 3.50 2.37 ± 0.70 0.086
Duration of surgery 189.24 ± 50.41 270.83 ± 68.38 <0.001
Blood loss during surgery 257.79 ± 126.56 297.96 ± 129.00 <0.001
Location of anastomosis    <0.001
 Cervical 27(5.0 %) 134 (89.3 %)  
 Intrathoracic 518 (95.0 %) 16 (10.7 %)  
Length of tumor 4.81 ± 1.96 4.67 ± 1.79 0.288
Pathological stage    0.336
 Ia 48 (8.8 %) 11(7.3 %)  
 Ib 258 (47.3 %) 67 (44.7 %)  
 IIa 239 (43.9 %) 72 (48.0 %)  
Location of tumor    <0.001
 Upper third 15 (2.8 %) 63 (42.0 %)  
 Middle third 405 (74.3 %) 80 (53.3 %)  
 Lower third 125 (22.9 %) 7 (4.7 %)  
Method of anastomosis    0.006
 Manual 50 (9.2 %) 124 (82.7 %)  
 Mechanical 495 (90.8 %) 26 (17.3 %)  
Grade of differentiation of tumor    0.102
 High 213 (39.1 %) 44 (29.3 %)  
 Middle 219 (40.1 %) 74 (49.3 %)  
 Low 113 (20.7 %) 32 (21.3 %)  
Number of resected LNsa 9.18 ± 5.48 9.61 ± 8.02 0.171
Postoperative complications 73 (13.4 %) 40 (26.7 %) <0.001
  1. FEV1 forced expiratory volume in 1 second
  2. LNs lymph nodes