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Table 3 Difference (95% CI) of mean % arsenic species in urine by body composition measure categories

From: Body composition and arsenic metabolism: a cross-sectional analysis in the Strong Heart Study

 

% iAs

% MMA

% DMA

 

Unadjusted

Adjusted

Unadjusted

Adjusted

Unadjusted

Adjusted

Body mass index

  < 25 kg/m2

0.0 (referent)

0.0 (referent)

0.0 (referent)

0.0 (referent)

0.0 (referent)

0.0 (referent)

  ≥ 25, < 30 kg/m2

-0.8 (-1.3, -0.3)

-0.7 (-1.2, -0.3)

-1.5 (-2.0, -1.0)

-1.4 (-1.9, -1.0)

2.3 (1.5, 3.2)

2.2 (1.4, 3.0)

  ≥ 30, < 35 kg/m2

-1.8 (-2.3, -1.3)

-1.6 (-2.0, -1.1)

-3.1 (-3.6, -2.6)

-2.8 (-3.3, -2.3)

4.9 (4.0, 5.7)

4.3 (3.5, 5.1)

  ≥ 35

-2.3 (-2.8, -1.7)

-1.7 (-2.2, -1.2)

-4.8 (-5.4, -4.3)

-4.0 (-4.5, -3.5)

7.1 (6.2, 8.0)

5.7 (4.8, 6.5)

  P for trend

< 0.001

<0.001

<0.001

<0.001

<0.001

<0.001

% Body fat

  Quartile 1

0.0 (referent)

0.0 (referent)

0.0 (referent)

0.0 (referent)

0.0 (referent)

0.0 (referent)

  Quartile 2

-0.6 (-1.1, -0.2)

-0.6 (-1.0, -0.2)

-1.2 (-1.7, -0.8)

-1.1 (-1.6, -0.7)

1.9 (1.1, 2.7)

1.7 (1.0, 2.4)

  Quartile 3

-0.9 (-1.4, -0.5)

-0.8 (-1.2, -0.4)

-1.9 (-2.4, -1.4)

-1. 7 (-2.1, -1.2)

2.8 (2.1, 3.6)

2.5 (1.8, 3.2)

  Quartile 4

-1.2 (-1.6, -0.7)

-1.2 (-1.6, -0.7)

-3.0 (-3.4, -2.5)

-2.6 (-3.1, -2.2)

4.1 (3.4, 4.9)

3.8 (3.1, 4.5)

  P for trend

<0.001

<0.001

<0.001

<0.001

<0.001

<0.001

Fat free mass

  Quartile 1

0.0 (referent)

0.0 (referent)

0.0 (referent)

0.0 (referent)

0.0 (referent)

0.0 (referent)

  Quartile 2

-0.8 (-1.2, -0.3)

-0.8 (-1.2, -0.4)

-1.2 (-1.7, -0.7)

-1.2 (-1.7, -0.8)

2.0 (1.2, 2.7)

2.0 (1.3, 2.7)

  Quartile 3

-0.6 (-1.1, -0.2)

-0.7 (-1.1, -0.2)

-1.5 (-2.0, -1.1)

-1.6 (-2.0, -1.1)

2.2 (1.4, 2.9)

2.2 (1.5, 2.9)

  Quartile 4

-1.5 (-1.9, -1.0)

-1.4 (-1.9, -1.0)

-2.9 (-3.4, -2.5)

-2.8 (-3.3, -2.3)

4.4 (3.6, 5.2)

4.2 (3.5, 5.0)

  P for trend

<0.001

<0.001

<0.001

<0.001

<0.001

<0.001

Waist circumference

  Quartile 1

0.0 (referent)

0.0 (referent)

0.0 (referent)

0.0 (referent)

0.0 (referent)

0.0 (referent)

  Quartile 2

-0.8 (-1.2, -0.3)

-0.8 (-1.2, -0.4)

-1.2 (-1.7, -0.7)

-1.2 (-1.7, -0.8)

2.0 (1.2, 2.8)

2.0 (1.3, 2.7)

  Quartile 3

-1.2 (-1.7, -0.8)

-1.2 (-1.6, -0.8)

-2.3 (-2.7, -1.8)

-2.2 (-2.6, -1.7)

3.5 (2.7, 4.2)

3.3 (2.6, 4.1)

  Quartile 4

-1.6 (-2.0, -1.2)

-1.6 (-2.1, -1.2)

-3.4 (-3.9, -3.0)

-3.2 (-3.6, -2.7)

5.0 (4.3, 5.8)

4.8 (4.1, 5.5)

  P for trend

<0.001

<0.001

<0.001

<0.001

<0.001

<0.001

  1. Adjusted linear regression models control for age, sex, specific gravity-corrected arsenic, education, and drinking and smoking status.
  2. Quartiles for waist circumference, % body fat and fat free mass use sex-specific cutpoints.