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Table 1 Demographic variables of delirious and non-delirious patients

From: Absence of association between whole blood viscosity and delirium after cardiac surgery: a case-controlled study

Characteristic

Delirious (N = 12)

Non-delirious (N = 48)

p-value

Age (years), (mean, SD)

69 (5.6)

65 (8.2)

0.16

Male, N (%)

8 (67 %)

36 (75 %)

0.56

Duration of surgery in minutes (mean, SD)

195 (73)

187 (50)

0.65

ECC-time (min), (mean, SD)

107 (43)

90 (21)

0.21

AOX-time (min), (mean, SD)

65 (22)

59.8 (17)

0.36

APACHE-II Score (mean, SD)

17 (4)

15 (4)

0.19

Euro score (mean, SD)

3.8 (2.0)

3.5 (2.0)

0.68

Serum creatinine level (μmol. L-1), (median, IQR)

87 (68–94)

81 (73–94)

0.72

MDRD-GFR (ml. min-1. 1.73 m-2), (median, IQR)

78 (59–90)

81 (64–90)

0.49

Urea level (mmol. L-1), (median, IQR)

8.0 (7.2–9.1)

7.3 (6.0–8.6)

0.20

Fluid balance (mL), (median, IQR)

909 (34–1171)

375 (-137–1121)

0.65

EF (%), (median, IQR)

60.0 (46.3–60.0)

55.0 (45.0–60.0)

0.40

MAP (mmHg), (median, IQR)

75 (68–77)

75 (71–83)

0.40

Admission of inotropes or vasopressors, N (%)

10 (83 %)

28 (58 %)

0.11

Duration of mechanical ventilation (≥24 h), N (%)

0 (0 %)

0 (0 %)

N/A

PTT (sec), (median, IQR)

19 (18–21)

18 (18–19)

0.26

Diabetes mellitus, N (%)

0 (0 %)

5 (10 %)

0.83

Glucose level (mmol. L-1), (median, IQR)

7.9 (7.3–8.8)

7.6 (6.7–8.2)

0.36

Temperature (°C), (median, IQR)

36.6 (35.3–37.1)

36.6 (35.9–36.9)

0.93

Confirmed infection, N (%)

0 (0 %)

0 (0 %)

N/A

  1. Definition of abbreviations: ECC extracorporeal circulation, AOX aortic cross clamp, min minutes, APACHE II acute physiology and chronic health evaluation II, Euro European system for cardiac operative risk evaluation, IQR interquartile range, MDRD-GFR modification of diet in renal disease-glomerular filtration rate, EF ejection fraction, MAP mean arterial blood pressure, N/A not applicable, PTT partial thromboplastin time, sec seconds, SD standard deviation