Age (year)

71.0 ± 4.4

69 ± 5.4

0.140

BUN

19.4 ± 2.1

21.2 ± 1.5

0.149

Creatinine

1.7 ± 0.6

1.8 ± 0.8

0.452

Hemoglobin

13.7 ± 2.1

14.6 ± 1.3

0.370

Sodium

144.0 ± 7.4

141.0 ± 4.2

0.440

Fluid balance (intra-operative)

1855.0 ± 405.0

1890.0 ± 317.0

0.115

Potassium

4.2 ± 1.0

4.1 ± 1.0

0.092

GFR (ml/min)

57.0 ± 5.0

54.0 ± 4.4

0.084