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Table 1 The clinical, pathological and surgical features of patients in the MIE group

From: Learning curve for minimally invasive oesophagectomy of oesophageal cancer and survival analysis

 

1st stage

2nd stage

3rd stage

4th stage

P value

Cases

20

37

50

107

 

Proportion of males (%)

95

89

88

81

0.340

Age mean (SD)

58.2(10.6)

63.1(10.8)

60.9(8.9)

64.7(10.4)

0.351

Proportion of smoking (%)

83

87

80

80

0.637

Neoadjuvant therapy (%)

15

16.2

22

13

0.479

Histology type

Squamous Cell Carcinoma

 20

37

49

106

 

Adenocarcinoma

0

0

1

0

 

Small Cell Carcinoma

0

0

0

1

0.543

Differentiation grade

Middle or high differentiated

16

16

17

42

 

 Poorly differentiated

4

21

33

65

0.004

Pathological stage

I

0

0

0

6

 

II

13

23

28

52

 

III

7

14

22

49

0.103

Negative margin

100%

100%

100%

98.13%

 

Cases

20

37

50

107

 

Bleeding volume (ml)

265.5 ± 107.2

199.4 ± 102.8

189.1 ± 90.7

185.9 ± 86.1

0.0092

Operation time (mins)

420.2 ± 64.3

263.5 ± 47.6

244.9 ± 60.2

248.1 ± 51.2

0.0000

Complication rate (%)

50.0

29.7

26.1

23.5

0.105

Cervical anastomotic fistula (%)

16.7(3/18)

14.8(4/27)

8.7(3/34)

9.8(6/61)

0.759

Chest anastomotic fistula (%)

0

0

0

4.3(2/46)

0.632

laryngeal nerve injury (%)

5

5.4

4

3.7

0.813

Mortality within 3 months (%)

10.0

5.4

0

0

0.0024

Lymph node dissection 

12.65 ± 4.13

15.91 ± 3.36

20.16 ± 7.71

22.67 ± 7.39

0.0000

Node dissection ≥ 12

14

36

50

101

0.0000

Node dissection ≥ 18

1

12

29

71

0.0000

Location

Upper or mid to upper

1

8

9

15

 

Mid or lower to mid

18

23

30

65

 

Lower

1

6

11

27

0.367

Procedure

Ivor-Lewis

2

10

16

46

 

McKeown

18

27

34

61

0.021