|
Results from linear multiple regression analyses. a |
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| Dependent variable |
Independent variable(s) in the final model |
Unstandardized Coefficients |
Standardized Coefficients |
t |
Sig. |
95 % Confidence Interval for B |
||
|
|
|
|||||||
| B |
Std. Error |
Beta |
Lower Bound |
Upper Bound |
||||
|
|
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| a) I-Hg in brain cortex |
Constant |
4.366 |
0.925 |
4.720 |
<0.001 |
2.468 |
6.264 |
|
| Filled surfaces – amalgam |
0.153 |
0.045 |
0.550 |
3.423 |
0.002 |
0.061 |
0.245 |
|
| b) Total-Hg in pituitary |
Constant |
25.540 |
36.893 |
0.692 |
0.495 |
-50.158 |
101.238 |
|
| Filled surfaces – amalgam |
5.972 |
1.788 |
0.541 |
3.340 |
0.002 |
2.304 |
9.640 |
|
| c) Total-Hg in thyroid |
Constant |
13.682 |
3.359 |
4.073 |
<0.001 |
6.763 |
20.601 |
|
| Filled surfaces – amalgam |
0.491 |
0.157 |
0.530 |
3.126 |
0.004 |
0.168 |
0.815 |
|
| d) Total-Hg in toenails |
Constant |
126.115 |
50.564 |
2.494 |
.019 |
22.180 |
230.051 |
|
| MeHg in blood (μg/L) |
58.888 |
14.190 |
0.631 |
4.150 |
<0.001 |
29.720 |
88.056 |
|
|
a Final results from linear multiple regression analyses using number of surfaces filled with amalgam, age, gender, and MeHg in blood as independent variables (all variables entered at the first step, and removed in the following step(s) if the p-value of the variable was ≥0.10) and (a) I-Hg in brain cortex (μg I-Hg/kg) as dependent variable, (b) Total-Hg in pituitary (μg Hg/kg) as dependent variable, (c) Total-Hg in thyroid (μg Hg/kg) as dependent variable and (d) Total-Hg in toenails (μg Hg/kg) as dependent variable. The case with previous occupational exposure to mercury (case 28) was excluded from the regression analyses (see text). N = 29 in model (a) and (b), n = 27 in model (c) and n = 28 in model (d). | ||||||||
Björkman et al. Environmental Health 2007 6:30 doi:10.1186/1476-069X-6-30 |
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