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Table 1 The baseline characteristics and comparison of surgical outcomes among the four groups of patients who underwent thoracoscopic and laparoscopic radical resection for esophageal cancer

From: Study on the learning curve for thoracoscopic and laparoscopic radical resection of esophageal cancer

Variable

Group A

n = 16

Group B

n = 16

Group C

n = 16

Group D

n = 16

F/χ2

p

Sex (M/F)

10/6

9/7

9/7

8/8

0.45*

0.502

Age (year)

69.81 ± 5.77

67.56 ± 7.61

62.56 ± 7.16

65.43 ± 7.32

3.177#

0.033

Position

      

 UTEC

2

4

2

4

  

 MTEC

8

9

13

8

2.63*

0.452

 LTEC

6

3

1

4

  

T stage

      

 T1

2

5

4

10

  

 T2

7

4

5

0

3.84*

0.279

 T3

7

6

4

6

  

 T4

0

1

3

0

  

N stage

      

 N0

13

12

7

7

  

 N1

3

1

3

7

7.374*

0.061

 N2

0

0

6

1

  

 N3

0

3

0

1

  

Operative time (min)

350 ± 42.74

281.56 ± 31.39

238.75 ± 54.78

223.43 ± 38.15

38.433##

0.001

Intrathoracic operative time (min)

210.38 ± 27.91

164.56 ± 21.83

135.81 ± 37.51

118.94 ± 20.05

40.19##

0.001

abdominal operative time (min)

102.63 ± 15.02

80.13 ± 9.63

67.19 ± 17.44

58.94 ± 10.91

39.78##

0.001

Conversion to thoracotomy (n)

0

0

1

0

-

-

Intraoperative bleeding (mL)

246.87 ± 67.00

175 ± 81.64

246.87 ± 367.18

159.37 ± 63.81

14.211#

0.003

One week’s drainage (mL)

1162 ± 975.79

753.12 ± 299.15

893.75 ± 792.64

662.50 ± 93.99

12.2#

0.007

MDT indwelling time(day)

14.19 ± 14.19

14.43 ± 15.47

11.43 ± 11.58

9.18 ± 9.30

7.689#

0.053

Postoperative complication

      

 Anastomotic leakage

2

2

1

1

  

 Hoarseness

2

3

5

4

0.5079*

0.9171

 Chylothorax

1

0

1

0

  

 Pulmonary infections

1

1

1

2

  

Postoperative fasting time (day)

12.88 ± 13.53

13.18 ± 15.34

10.81 ± 12.62

8.62 ± 9.97

3.458#

0.326

Postoperative hospital stays (day)

19.81 ± 13.78

19.87 ± 14.35

17.31 ± 12.61

14.75 ± 10.25

8.096#

0.044

Time of using analgesics (day)

7.19 ± 1.91

5.88 ± 1.36

5.88 ± 1.50

5.56 ± 0.73

15.608##

0.001

The total number of dissected lymph nodes

11.44 ± 2.61

20.06 ± 5.49

23.88 ± 9.63

26.37 ± 10.64

11.245#

0.001

The number of dissected lymph nodes 106R

1.56 ± 0.29

2.62 ± 0.33

3.12 ± 0.55

2.06 ± 0.62

2.058#

0.115

The number of dissected lymph nodes 106 L

1.06 ± 0.31

2.00 ± 0.26

4.68 ± 0.94

3.50 ± 0.82

5.898#

0.001

  1. UTEC, upper thoracic esophageal cancer; MTEC, middle thoracic esophageal cancer; MTEC, lower thoracic esophageal cancer; MDT, mediastinal drainage tube; 106R, right recurrent laryngeal lymph nodes; 106 L, left recurrent laryngeal lymph nodes
  2. were analyzed by Clavien–Dindo Classification using χ2 tests, p = 0.369; * were assessed using χ2 tests or Fisher’s exact tests as appropriate; # were assessed using one-way ANOVA; ## were assessed using U test