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Table 3 Univariate analysis for determinants of renal dysfunction

From: Determinants of postoperative acute kidney injury

Variable

AKI/non AKI

Odds ratio (95% CI)

P

 

n = 87/n = 1079

  

Age

66.9 ± 13.2/61.5 ± 15.5

1.03 (1.01 to 1.04)

0.002

   ≥65 years

56 (64)/525 (49)

1.91 (1.21 to 3.00)

0.005

   < 65 years

31 (36)/554(51)

1

 

Gender

 

0.96 (0.61 to 1.51)

0.855

   Female

31 (36)/374 (35)

  

   Male

56 (64)/705 (65)

  

Body mass index, median

24.0 ± 4.3/25.6 ± 5.8

0.94 (0.89 to 1.00)

0.019

Duration of anesthesia (min.)

233 ± 140/230 ± 113

1.00 (0.99 to 1.00)

0.772

General/Combined anesthesia, n. (%)

72 (85)/868 (80)

4.59 (1.43 to 14.71)

0.010

Emergency surgery

29 (33)/202 (19)

2.17 (1.36 to 3.49)

0.001

ASA physical status

   

   II/III

68(78)/1026 (95)

1

 

   IV/V

19 (22)/53 (5)

5.41 (3.03 to 9.65)

< 0.001

Temperature at admission

35.1 ± 1.8/35.2 ± 1.3

0.91 (0.78 to 1.07)

0.251

Troponin at admission

0.20 ± 0.57/0.06 ± 0.29

1.81 (0.95 to 3.44)

0.070

Hypertension

40(46)/525 (49)

0.90 (0.58 to 1.39)

0.631

Hyperlipidemia

24 (28)/314(29)

0.93 (0.57 to 1.50)

0.765

High-risk surgery

63 (72)/465 (43)

3.47 (2.13 to 5.63)

< 0.001

Ischemic heart disease

33 (38)/246 (23)

2.07 (1.31 to 3.26)

0.002

Congestive heart disease

40 (46)/193 (18)

3.91 (2.49 to 6.12)

< 0.001

Cerebrovascular disease

12(14)/158 (15)

0.93 (0.50 to 1.76)

0.829

Insulin therapy for diabetes

9 (10)/95 (9)

1.20 (0.58 to 2.46)

0.628

RCRI

   

   ≤2

54 (62)/833 (77)

1

 

   > 2

33 (38)/246 (23)

3.30 (2.12 to 5.14)

< 0.001

Intraoperative fluid volume

   

   Crystalloids (L)

3.0 ± 2.3/2.6 ± 1.7

1.14 (1.02 to 1.28)

0.024

   Colloids (L)

0.3 ± 0.5/0.2 ± 0.4

1.76 (1.11 to 2.78)

0.016

   Erythrocytes (Units)

1.2 ± 2.6/0.7 ± 1.5

1.15 (1.04 to 1.27)

0.005

   Fresh frozen plasma (Units)

0.6 ± 1.5/0.2 ± 1.0

1.22 (1.04 to 1.42)

0.012

  1. AKI = acute kidney injury; ASA = American Society of Anesthesiologists; CI = confidence interval; RCRI = Revised Cardiac Risk Index