Table 2 Clinical data in three groups stratified by serum calcium trajectories

Age(years), mean (SD)

49.1 ± 8.0

48.7 ± 7.8

49.1 ± 7.9

49.4 ± 9.1

0.862

Female, n, (%)

62(16.2)

11(12.9)

44(17.0)

7(17.9)

0.647

BMI (kg/m²), mean (SD)

24.7 ± 3.4

24.6 ± 3.4

24.6 ± 3.3

26.1 ± 3.3

0.033

Smoking, n, (%)

184(48.0)

47(55.3)

122(66.3)

15(38.5)

0.190

Drinking, n, (%)

123(32.1)

23(27.1)

85(32.8)

18(46.2)

0.110

Medical history

 Diabetes mellitus, n, (%)

41(10.7)

12(14.1)

24(9.3)

5(12.8)

0.411

 Hypertension, n, (%)

329(85.9)

73(81.2)

224(86.5)

36(92.3)

0.227

Prior resuscitation, n, (%)

  ≥ 3 organs, n, (%)

9(2.3)

2(2.4)

4(1.5)

3(7.7)

0.061

Echocardiography results

 LVEF (%), mean (SD)

62.34 ± 7.75

62.88 ± 7.55

62.82 ± 7.34

57.96 ± 9.50

0.001

Laboratory results

 Hb(g/L), mean (SD)

125.58 ± 18.33

128.55 ± 20.25

125.48 ± 19.11

119.76 ± 17.75

0.875

 CRP (mmol/L), median (IQR)

13.6(5.2, 32.0)

16.0(6.7, 28.8)

12.0(5.2, 34.2)

12.0(4.5, 36.0)

0.648^a

 Cr(mmol/L), median (IQR)

90(73, 132)

92(70, 134)

89(73, 132)

93(77, 131)

0.670^a

 BNP (mmol/L), median (IQR)

328(128, 934)

328(135, 858)

326(117, 986)

365(128, 920)

0.983^a

 Serum albumin(g/l), median (IQR)

43(38,49)

38(36,53)

43(39,51)

43(37,51)

0.958^a

 Serum potassium(mmol/l), mean (SD)

4.17 ± 0.56

4.06 ± 0.48

4.21 ± 0.59

4.13 ± 0.45

0.083

 Serum sodium(mmol/l), mean (SD)

136.39 ± 5.87

136.28 ± 6.12

136.51 ± 6.00

135.82 ± 4.29

0.782

 Serum chloride(mmol/l), mean (SD)

98.14 ± 7.23

98.82 ± 11.80

98.33 ± 5.20

95.43 ± 5.08

0.040

Surgical management

 Root replacement, n, (%)

14(3.7)

3(3.5)

8(3.1)

3(7.7)

0.395

 Additional CABG, n, (%)

9(2.3)

3(3.5)

5(1.9)

1(2.6)

0.481^b

 Operation time(min), median (IQR)

305(265, 361)

300(265, 387)

305(270, 353)

319(262, 355)

0.955^a

 CPB time(min), median (IQR)

151(132, 189)

152(133, 203)

153(130, 188)

147(134, 185)

0.791^a

 Calcium infusion(g), median (IQR)

72(55, 100)

78(54, 104)

72(55, 97)

67(49, 127)

0.849^a

 Calcium infusion initiated in OR, n, (%)

48(12.5)

9(10.6)

31(12.0)

8(20.5)

0.268

 Lactic acid_max (mmol/l), median (IQR)

3.7(2.3, 6.6)

4.1(2.7, 8.2)

3.5(2.0, 6.4)

4.5(3.2, 7.0)

0.003^a

 VIS_max

9.4(2.9, 20.0)

8.6(3.0, 20.0)

9.0(2.8, 20.0)

13.3(4.4, 20.0)

0.344^a