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Table 3 Distribution of preoperative and operative data according to status (death or alive) at one year after surgery

From: Incidence and outcomes of acute kidney injury after cardiac surgery using either criteria of the RIFLE classification

Variable

Death

Alive

p-value

(N = 20)

(N = 344)

Age (years)

77.0 (69.5 - 79.5)

68.5 (60.0 - 75.0)

0.004

Gender (Female) (%)

9 (45.0)

94 (27.3)

0.89

BMI (kg/m2)

24.5 (22.6 - 27.9)

26.2 (23.6 - 29.3)

0.28

Hypertension (%)

7 (35.0)

56 (16.3)

0.74

COPD (%)

7 (35.0)

56 (16.3)

0.03

Angina pectoris (%)

9 (45.0)

149 (43.3)

0.88

MI previous surgery (%)

3 (15.0)

87 (25.3)

0.30

Diabetes (%)

4 (20.0)

80 (23.3)

0.74

Emergency (%)

1 (5.00)

8 (2.33)

0.45

Preoperative GFR (mL/min)

60.0 (43.0 - 75.0)

79.5 (65.0 - 93.0)

0.002

Preoperative hemoglobin (g/dL)

11.4 (9.9 - 13.0)

13.9 (12.6 - 14.9)

< 0.001

LVEF < 60 %

10 (50.0)

82 (23.9)

0.008

Surgical delay (days)

14.0 (4.0 - 19.0)

22.0 (8.0 - 45.0)

0.008

Type of surgery

   

OPCABG (%)

1 (5.00)

42 (12.2)

0.41

CABG (%)

6 (30.0)

142 (41.3)

 

Valve surgery (%)

9 (45.0)

116 (33.7)

 

Valve and CABG (%)

4 (20.0)

44 (12.8)

 

CPB time (min.)*

89.5 (79.0 - 110.0)

85.0 (66.5 - 102.5)

0.19

Aortic cross clamp time (min.)*

59.5 (44.5 - 78.0)

51.0 (35.0 - 67.0)

0.13

Nadir hematocrit (%)

19.0 (18.0 -19.0)

21.0 (19.0 - 24.0)

< 0.001

Nadir MAP during surgery (mmHg)

45.0 (40–53)

45.0 (40–55)

0.68

Postoperative AKI (%)

15 (75.0)

175 (50.9)

0.04

  1. Data are expressed as median (25-75th percentiles) or proportion of patients in %
  2. *Data are calculated as median (25-75th percentiles) only for cases with cardiopulmonary bypass (n=385)
  3. BMI: body mass index; COPD: chronic obstructive pulmonary disease; MI: myocardial infarction; GFR: glomerular filtration rate; LVEF: left ventricular ejection fraction; Surgical delay: delay between diagnostic coronarography and surgery; OBCABG: off-pump coronary artery bypass graft; CABG: Coronary artery bypass graft with cardiopulmonary bypass; Valve surgery: aortic valve replacement or mitral valve repair/replacement surgery; Valve and CABG: aortic valve replacement or mitral valve repair/replacement surgery combined with coronary artery bypass graft; CPB: cardiopulmonary bypass; MAP: mean arterial pressure