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Table 4 Inter-individual variability in hourly urinary flow and creatinine excretion rates calculated from nocturnal urine collections

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)

Range

(Min-Max)

(mL/h)

Percentiles (5–95th)

(mL/h)

Max

Min

CVa

%

Mean

(mL/h)

Range

(Min-Max)

(mL/h)

Percentiles (5–95th)

(mL/h)

Max

Min

CVa

%

Adults

          

Urban

(n = 74)

59.8

7.21–133

21.8–113

18

47.1

0.049

0.016–0.10

0.019–0.084

6.7

36.4

Rural

(n = 109)

63.4

20.6–127

29.7–108

6.2

38.7

0.062

0.020–0.14

0.034–0.10

7.1

35.6

Both

(n = 183)

62.0

7.21–133

26.4–112

18

42.1

0.057

0.016–0.14

0.029–0.095

9.2

37.4

Children

          

Urban

(n = 74)

32.0

10.7–69.5

13.4–61.9

6.5

48.0

0.027

0.011–0.082

0.014–0.045

7.7

42.1

Rural

(n = 42)

26.6

10.8–64.6

14.3–48.7

6.0

45.9

0.025

0.0071–0.065

0.013–0.042

9.1

44.6

Both

(n = 116)

30.1

10.7–69.5

13.6–61.4

6.5

48.2

0.026

0.0071–0.082

0.014–0.045

12

43.1

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