Variables

Frequency

Pre-opHCO₃

POD¹HCO₃

POD²⁸HCO₃

P-value

N = 342 (%)

N = 70 (%)

N = 136 (%)

N = 47 (%)

ANOVA

<20

<20

<20

Gender

Males

206 (60.2%)

43 (61.4%)

72 (52.9%)

28 (66.1%)

0.001

Female

136 (39.8%)

27 (38.3%)

64 (47.1%)

19 (33.9%)

Age, years

16 - 49

144 (42.1%)

12 (17.1%)

22 (16.2%)

18 (38.3%)

<0.001

≥50

198 (57.9%)

58 (82.9%)

114 (83.8%)

29 (61.7%)

BMI, kg/m²

<25.0

179 (52.3%)

25 (35.7%)

28 (20.6%)

20 (42.6%)

<0.001

≥25.0

163 (47.7%)

(64.3%)

108 (79.4%)

27 (57.4%)

SBP, mmHg

<140

144 (42.1%)

31 (44.3%)

34 (25.0%)

22 (46.8%)

0.003

≥140

198 (58.9%)

39 (55.7%)

102 (75.0%)

25 (53.2%)

DBP, mmHg

<90

154 (45.0%)

25 (35.7%)

63 (46.3%)

23 (48.9%)

0.05

≥90

188 (55.0%)

45 (64.3%)

73 (53.7%)

24 (51.1%)

SPO₂, %

<95

58 (17.0%)

27 (38.6%)

49 (36.0%)

11 (23.4%)

0.04

≥95

294 (83.0%)

43 (61.4%)

87 (64.0%)

36 (76.6%)

Surgery

Open heart

128 (37.4%)

49 (70.0%)

97 (71.3%)

28 (59.6%)

<0.001

Vascular

101 (29.5%)

18 (25.7%)

35 (25.7%)

17 (36.2%

Intermediate

113 (33.1%)

3 (4.3%)

4 (3.0%)

2 (4.2%)