Table 1 Baseline patient characteristics

General information of patients

Gender

5.456

0.020

Male, n(%)

19(36.5)

158(54.1)

Female, n(%)

33(63.5)

134(45.9)

Age

62.00 ± 9.21

58.578 ± 11.17

32.093

0.037

BMI

23.45 ± 3.62

23.11 ± 3.55

0.629

0.530

Smoke

0.467

0.494

Yes, n(%)

7(13.5)

30(10.3)

No, n(%)

45(86.5)

262(89.7)

Drink

0.471

0.493

Yes, n(%)

9(17.3)

40(13.7)

No, n(%)

43(82.7)

252(86.3)

Hypertension

6.588

0.010

Yes, n(%)

33(63.5)

129(44.2)

No, n(%)

19(36.5)

163(55.8)

Diabetes

2.324

0.127

Yes, n(%)

22(44.3)

92(31.5)

No, n(%)

30(57.7)

200(68.5)

Pre-operative information of patients

Cardiac function

classification

5.965

0.051

Class I

0(0)

0(0)

Class II

33(63.5)

229(78.4)

Class III

17(32.7)

69(23.6)

Class IV

2(3.8)

4(1.4)

LVEF(%)

56.50(52.00, 61.75)

57.00(55.00, 62.00)

1.371

0.170

Leukocyte 10⁹/L

13.32 ± 3.78

11.85 ± 3.84

2.541

0.011

Neutrophil 10⁹/L

9.80(8.50, 12.08)

9.65(8.25, 10.77)

1.212

0.226

Erythrocyte10¹²/L

4.46 ± 0.61

4.51 ± 0.78

0.500

0.617

Blood platelet

10⁹/L

161.00(128.00, 236.5)

172.50(142.00, 235.00)

0.837

0.403

Hemoglobin g/L

131.25 ± 13.53

133.10 ± 13.25

0.930

0.353

CEA U/ml

2.20(1.33, 3.80)

2.10(1.40, 3.00)

1.033

0.301

CA-125 U/ml

27.89(13.64, 61.54)

14.48(9.87, 24.08)

3.889

0.000

CA-199 U/ml

12.33 ± 6.63

11.82 ± 8.91

0.390

0.697

Intraoperative information of patients

Operation time

(min)

273.70 ± 67.30

261.03 ± 68.52

1.189

0.235

Extracorporeal circulation time (min)

124.17 ± 32.68

116.71 ± 31.22

1.576

0.116

Post-operative information of patients

Days of ICU stay(d)

2.20(1.33, 3.80)

2.10(1.40, 3.00)

2.691

0.007

Duration of

mechanical ventilation(h)

19.00(16.00, 22.00)

18.00(15.00, 21.00)

1.149

0.251

CO L/min

5.40(4.10, 7.20)

5.8(4.60, 7.78)

1.067

0.287