Table 3 Postoperative outcomes of the study participants

Postoperative reexamination results

WBC (10^9/l)^#

12.4 ± 2.4

13.3 ± 4.8

0.72

0.48

Hb (g/l)^#

118.6 ± 10.9

114.0 ± 10.9

1.54

0.13

CRP (mg/dl)*

12.3[8.5,25.2]

13.9[9.8,21.0]

300

0.666

NT-BNP (pg/ml)*

1047.0[499.9,1472.0]

912.5[493.0,1683.0]

322

0.970

Arrhythmia (Yes/No)

1/17

2/34

0

0.71

Atrioventricular block (Yes/No)

4/14

4/32

1.174

0.244

Retention time of drainage tube (hours)^#

88.6 ± 25.8

86.3 ± 31.3

0.27

0.791

Auxiliary ventilation time (minutes)*

127.5[120.0,155.0]

145.0[112.5,180.0]

295

0.599

Treatment time (hours)*

42.0[19.8,72.3]

41.8[21.3,45.0]

265.5

0.287

Postoperative drainage (ml)*

117.5[92.8,152.8]

151.5[118.5,214.5]

198.5

0.021

The time to pull out the drainage tube after operation was longer than 4 days (Yes/No)

5/13

10/36

0

0.62

Postoperative atelectasis (Yes/No)

1/17

6/30

1.31

0.25

Postoperative funnel chest (Yes/No)

0/18

1/35

0.51

0.667

Chicken breast after operation (Yes/No)

0/18

8/28

4.70

0.029

Postoperative sedation and analgesia (Yes/No)

2/16

19/17

8.77

0.00

Wound infection (Yes/No)

0/17

7/29

4.0

0.047

Length of stay (days)*

11.0[9.8,13.3]

9.5[8.0,13.0]

248.5

0.165

Operative incision length (cm)*

4.8[4.0,5.0]

7.0[7.0,8.0]

0

< 0.001

Postoperative appearance (Satisfactory/Unsatisfactory)

18/0

27/9

5.4

0.018^*