Factors

N or median

(% or range)

Gender

Male:Female

45:15

Age (year)

65.0

(46 - 80)

Tumor location

Upper:Middle:Lower

9:36:15

ASA Score

ASA1:ASA2:ASA3

4:37:19

Neoadjuvant chemotherapy

Present:Absent

38:22

Operative procedure

(Thoracic)

Thoracoscopy

Convert to thoracotomy

59

1

98.3%

1.7%

Operative procedure

(Abdominal)

Laparoscopy

Laparotomy

56

4

93.3%

6.7%

Extent of lymph node dissection

3 field:2 field

15:45

Operation time (min)

Total

443

(240 - 874)

Thoracic

174

(97 - 352)

Blood loss (ml)

Total

220

(20 - 1575)

Thoracic

95

(10 - 520)

Number of harvested lymph node

37

(11 - 101)

Type of tumor

SCC:AD

59:1

Depth of tumor invasion

pT1a:pT1b:pT2:pT3:pT4

2:14:12:30:2

Lymph node metastasis

pN0:pN+

28:32

Pathological stage

I:II:III:IV

9:22:20:9

Lymphatic invasion

Present:Absent

28:32

Venous invasion

Present:Absent

35:25

Postoperative complications

Anastomotic leakage

Pneumonia

5

4

(8.3%)

(6.7%)

Conduit necrosis

2

(3.3%)

Chylothorax

2

(3.3%)

Bleeding

1

(1.7%)