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Table 2 Proportion of urinary arsenic species and methylation indices among 330 subjects

From: Arsenic speciation analysis of urine samples from individuals living in an arsenic-contaminated area in Bangladesh

 

Proportion (%)

Methylation indices

AsIII

AsV

MMA

DMA

iAsa

iAs + MMA

PMI

SMI

Total (330)

 25 percentile

10.4

0.9

8.2

68.0

12.0

22.1

0.51

4.95

 Median

13.4

1.5

10.9

73.2

15.4

26.7

0.68

6.65

 75 percentile

16.5

2.3

13.9

77.8

18.9

31.7

1.00

9.25

Male (165)

 25 percentile

9.9

0.7

9.2

68.3

11.3

21.9

0.63

4.56

 Median

12.6

1.2

12.2

73.5

13.9

26.5

0.84

6.03

 75 percentile

15.7

1.8

15.2

78.1

17.0

31.5

1.10

8.41

Female (165)

 25 percentile

11.1

1.2

7.6

67.7

13.0

22.2

0.46

5.53

 Median

14.6

1.8

10.0

73.0

16.8

26.8

0.59

7.10

 75 percentile

17.6

2.7

12.7

77.7

19.9

32.2

0.77

10.03

Median difference (p)

0.001

<0.001

<0.001

0.912

0.001

0.912

<0.001

0.011

  1. Median difference between males and females tested by Mann–Whitney U test. p < 0.05 is statistically significant
  2. PMI primary methylation index calculated from urinary MMA/iAs, SMI secondary methylation index calculated from urinary DMA/MMA
  3. aValues are sum of AsIII and AsV
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Environmental Health and Preventive Medicine

ISSN: 1347-4715

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