Table 4 Differences in between BSA indexed GFR (ml/min per 1.73 m ² ) and absolute GFR values (ml/min) for 51Cr-EDTA, CKD-EPI and MDRD

51cr-EDTA

all

185

-3.01 (-4.57 to -1.46)

11

<0.001

104

2.42 (0.90 to 3.94)

7.81

<0.01

81

-10.09 (-12.18 to -7.83)

9.82

<0.001

BSA < 1.60

34

10.23 (8.57 to 11.90)

4.76

<0.001

32

10.48 (8.74 to 12.21)

4.80

<0.001

2

6.37 (-0.06 to 12.76)

0.71

0.0505

BSA 1.60-1.79

70

1.55 (0.84 to 2.25)

2.95

<0.001

52

1.84 (1.05 to 2.63)

2.83

<0.001

18

0.70 (-0.89 to 2.29)

3.2

0.37

BSA > 1.80

81

-12.53 (-14.26 to -10.79)

7.84

<0.001

20

-8.95 (-11.28 to -6.63)

4.97

<0.001

61

-13.70 (-15.82 to -11.58)

8.28

<0.001

CKD-EPI

all

185

-2.75 ( -4.31 to -1.19)

10.75

<0.001

104

2.67 (1.07 to 4.27)

8.22

<0.01

81

-9.73 (-11.84 to -7.61)

9.57

<0.001

BSA < 1.60

34

11.08 (9–05 to 13.11)

5.82

<0.001

32

11.24 (9.09 to 13.39)

5.96

<0.001

2

8.51 (-1.30 to 18.33)

1.09

0.057

BSA 1.60-1.79

70

1.57 (0.86 to 2.28)

2.97

<0.001

52

1.87 (1.09 to 2.64)

2.78

<0.001

18

0.71 (-0.98 to 2.40)

3.4

0.38

BSA > 1.80

81

-12.31 ( -13.94 to -10.68

7.37

<0.001

20

-8.94 (-11.02 to -6.86)

4.44

<0.001

61

-13.41 ( -15.41 to -11.41)

7.82

<0.001

MDRD

all

185

-2.68 ( -4.26 to -1.11)

10.85

<0.001

104

2.80 (1.21 to 4.38)

8.15

<0.001

81

- 9.72 (-11.89 to -7.55)

9.5

<0.001

BSA < 1.60

34

11.10 (8.87 to 13.32)

6.38

<0.001

32

11.27 (8.91 to 13.63)

6.54

<0.001

2

8.53 (-1.60 to 18.30)

1.1

0.059

BSA 1.60-1.79

70

1.63 (0.87 to 2.39)

3.20

<0.001

52

1.85 (1.07 to 2.63)

2.80

<0.001

18

0.98 (-1.08 to 3.06)

4.16

0.32

BSA > 1.80

81

-12.20 ( -13.86 to -10.54)

7.52

<0.001

20

-8.30 (-10.19 to -6.41)

4.04

<0.001

61

-11.44 (-15.52 to -12.50)

7.97

<0.001