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Table 3 Baseline demographic and clinical characteristics (preoperative, intraoperative, and postoperative) of patients

From: Evaluation of the PaO2/FiO2 ratio after cardiac surgery as a predictor of outcome during hospital stay

 

PaO2/FIO2

PaO2/FIO2

PaO2/FIO2

pvalue

ratio > 241

ratio 202-241

ratio < 202

 

(n = 2195)

(n = 257)

(n = 249)

 

Preoperative data

Age

65.3 (11.1)

66.1 (9.6)

66.0 (10.2)

0.392

BMI (kg∙m-2)

27.9 (8.5)

28.8 (4.2)

29.7 (17.5)

0.09

Gender (% male)

60.1

73.5

72.7

< 0.001

HBP (%)

61.8

67.7

66.7

<0.001

IDDM (%)

8.2

9.3

8.0

0.867

NIDDM (%)

17.5

17.9

18.1

0.748

DLP (%)

51.2

56.4

47.8

0.354

Smokers (%)

19.8

28.4

26.5

<0.001

Vasculopathy (%)

8.4

8.9

9.6

0.947

COPD (%)

9.9

17.5

21.7

<0.001

CRF (%)

4.1

5.1

10.4

<0.001

Ejection fraction (%)

60.7 (11.5)

58.7 (13.0)

60.0 (11.9)

0.06

Preoperative haematocrit (%)

39.5 (4.9)

40.5 (5.0)

38.8 (6.0)

<0.001

Preoperative platelets (x106/L)

216423 (67126)

213470 (60195)

219409 (79665)

0.615

Preoperative creatinine (μmol/l)

91.8 (48.5)

94.6 (37.1)

107.9 (80.8)

<0.001

Parsonnet

10.8 (6.4)

11.5 (8.0)

13.8 (9.9)

<0.001

EuroSCORE

5.2 (2.8)

5.5 (3.2)

6.2 (3.6)

0.006

Surgical group

CABG (%)

28.6

35.8

31.1

0.145

Valve (%)

62.7

55.3

60.7

0.145

CABG + Valve (%)

8.7

8.9

8.2

0.145

CPB time (min)

109.9 (36.4)

115.1 (37.6)

118.6 (40.7)

<0.001

Cross-clamping time (min)

71.9 (26.6)

73.2 (24.6)

76.0 (29.7)

0.07

Main Postoperative data

SAPS II

22.8 (8.9)

26.4 (9.0)

29.3 (10.4)

<0.001

APACHE II

11.7 (4.2)

13.0 (4.8)

14.7 (5.4)

<0.001

APACHE III

47.6 (16.2)

52.8 (18.5)

60.8 (20.7)

<0.001

Blood lactate at ICU admission (mmol/L)

2.3 (5.6)

2.3 (1.2)

2.4 (1.4)

0.960

TnI at ICU admission (μg/L)

6.5 (7.0)

7.0 (11.8)

9.4 (25.5)

<0.001

Need for blood products (units)

1.8 (2.5)

1.4 (2.8)

1.9 (3.1)

0.17

ICU stay (days)

6.4 (9.2)

8.48 (11.6)

12.5 (15.1)

<0.001

Hospital stay (days)

23.6 (19.5)

24.7 (18.0)

31.7 (23.0)

<0.001

In-ICU exitus (%)

2.6

4.7

8.4

< 0.001

In-hospital exitus (%)

4

6.2

11.2

<0.001

  1. PaO2/FiO2 Arterial partial pressure of O2 and fraction of inspired oxygen ratio, HBP High blood pressure, IDDM Insulin-dependent diabetes mellitus, NIDDM, Non-insulin-dependent diabetes mellitus, DLP Dyslipidaemia, COPD, Chronic obstructive pulmonary disease, CRF Chronic renal failure, BMI Body Mass Index, EuroSCORE European system for cardiac operative risk evaluation, SAPS Simplified Acute Physiology Score, APACHE Acute Physiology and Chronic Health Evaluation, CPB Cardiopulmonary bypass, CABG Coronary artery bypass graft, TnI Troponin I, Data expressed as mean (SD).
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BMC Anesthesiology

ISSN: 1471-2253

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