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Table 3 Intra-individual variability in hourly urinary flow rate and creatinine excretion rate over a 24-h period

From: Concentrations versus amounts of biomarkers in urine: a comparison of approaches to assess pyrethroid exposure

 

Urinary flow rate

Creatinine excretion rate

 

Mean

(mL/h)

Min

(mL/h)

Max

(mL/h)

Max

Min

CVa

%

Mean

(g/h)

Min

(g/h)

Max

(g/h)

Max

Min

CVa

%

Subject 1

66.9

38.4

96.5

2.5

36.1

0.074

0.043

0.10

2.4

32.9

Subject 2

67.7

38.4

107

2.8

48.2

0.061

0.055

0.069

1.3

9.66

Subject 3

120

24.9

437

18

101

0.044

0.031

0.051

1.7

13.7

Subject 4

119

57.6

176

3.1

42.3

0.038

0.030

0.047

1.6

14.5

Subject 5

68.8

23.2

123

5.3

57.0

0.027

0.012

0.038

3.2

32.0

Subject 6

46.2

24.7

62.4

2.5

42.0

0.035

0.028

0.044

1.6

24.0

Subject 7

91.0

22.9

185

8.1

77.7

0.034

0.026

0.040

1.5

14.3

Subject 8

53.9

26.9

107

4.0

68.5

0.069

0.065

0.074

1.1

6.06

Subject 9

38.0

20.3

57.3

2.8

40.0

0.052

0.049

0.055

1.1

6.00

Subject10

70.9

25.1

99.0

3.9

42.8

0.037

0.032

0.045

1.4

15.4

Subject 11

49.0

24.0

67.6

2.8

38.8

0.037

0.022

0.047

2.1

31.0

Subject 12

97.9

21.3

168

7.9

58.9

0.033

0.015

0.044

2.9

34.0

Subject 13

50.3

28.3

84.9

3.0

45.7

0.065

0.034

0.082

2.4

27.6

Subject 14

93.4

53.5

167

3.1

54.2

0.055

0.049

0.077

1.6

17.9

Subject 15

98.4

14.6

188

13

59.7

0.037

0.010

0.063

6.6

48.4

  1. aCV = coefficient of variation (standard deviation/mean × 100%)