Table 3.
Difference (95% CI) of mean % arsenic species in urine by body composition measure categories
| |
% 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 |
Adjusted linear regression models control for age, sex, specific gravity-corrected arsenic, education, and drinking and smoking status.
Quartiles for waist circumference, % body fat and fat free mass use sex-specific cutpoints.