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Table 1 Baseline characteristics of patients

From: Diagnosis and outcomes of acute kidney injury using surrogate and imputation methods for missing preadmission creatinine values

 

With preadmission creatinine (n = 498)

Without preadmission creatinine (n = 503)

p

Age (years)

Gender (male %)

Race (%)

67 (58–76)

59.4

65 (53–75)

61.6

0.005

0.48

 Caucasian/Asian

Body mass index

Known preadmission creatinine (μmol/l)

96.4

27 (24–32) (n = 251)

73 (60–90)

97.8

27 (24–31) (n = 261)

n/a

0.18

0.63

Baseline GFR MDRD (ml/min/1.73 m2)

89 (71–111)

n/a

 

CAD (%)

COPD (%)

Heart failure (%)

Cirrhosis (%)

Diabetes (%)

Hypertension (%)

CKD by history (%)

CKD MDRD <60 ml/min/1.73 m2

Cancer

Surgery (%)

SOFA score non-renal

SOFA score

Mechanical ventilation (%)

36.7

22.5

12.9

3.2

29.1

60.8

14.9

15.7

29.5

51.6

4 (2–7)

5 (2–8)

37.1

39.4

12.3

7.0

1.0

22.9

55.7

9.3

n/a

12.9

35.2

5 (2–8)

5 (2–8)

48.3

0.39

<0.001

0.002

0.02

0.02

0.10

0.007

<0.001

<0.001

0.08

0.21

<0.001

Vasopressors (%)

27.9

33.0

0.08

Cumulative fluid balance (L)

0.9 (-0.6 - 2.5)

0.8 (-0.7 - 2.4)

0.42

RRT

2.8

3.8

0.39

Hospital LOS

Mortality

10 (6–21)

12.9

10 (6–23)

11.7

0.77

0.59

  1. CAD coronary artery disease, COPD chronic obstructive pulmonary disease, CKD chronic kidney disease, SOFA Sequential Organ Failure Assessment Score, RRT renal replacement therapy, LOS length of stay
  2. Data were missing in <1% of records