Table 1 Baseline characteristics of the 80 patients

Age

56 ± 12

56 ± 10

0.861

Gender(male/female)

34/6

33/7

0.762

TNM stage(I/II/III)

7/18/15

6/20/14

0.897

Length of resection (cm)

10 ± 4.8

11 ± 4.0

0.157

Number of lymph node dissection

11 ± 4.1

10 ± 4.6

0.154

Alcohol consumption (yes/no)

25/15

23/17

0.648

Smoker(yes/no)

21/19

20/20

0.823

FEV1/FVC(%)

85.3 ± 3.3

85.1 ± 4.3

0.769

ASA classification (I/II)

18/22

17/23

0.822

Duration of operation (min)

206 ± 44

207 ± 43

0.918

Duration of anesthesia (min)

240 ± 46

242 ± 44

0.862

Blood loss during operation (mL)

520 ± 43

518 ± 62

0.903