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Table 5 Mean urinary mercury (μg Hg/g Cr) in people 6 to 79 years of age

From: Dental amalgam and urinary mercury concentrations: a descriptive study

Characteristic

Number of amalgam surfaces

Number of amalgam surfaces

All

0 Surfaces

1-5 Surfaces

6-10 Surfaces

11-15 Surfaces

16-20 Surfaces

21-25 Surfaces

26-30 Surfaces

31-45 Surfaces

46-65 Surfaces

 

Mean

95% CI

Mean

95% CI

Mean

95% CI

Mean

95% CI

Mean

95% CI

Mean

95% CI

Mean

95% CI

Mean

95% CI

Mean

95% CI

Mean

95% CI

All

0.26

0.23-0.30

0.12

0.10-0.16

0.22

0.17-0.28

0.36

0.30-0.44

0.52

0.38-0.71

0.79

0.63-0.99

1.09

0.80-1.49

1.91

1.49-2.46

2.12

E 1.21-3.71

2.45

E 1.31-4.59

Female

0.33

0.29-0.37

0.15

0.12-0.20

0.25

0.20-0.32

0.44

0.35-0.55

0.68

0.49-0.97

0.99

0.78-1.27

1.24

E 0.77-1.99

2.21

E 1.49-3.27

2.78

E 1.75-4.43

F

F

Male

0.21

0.18-0.25

0.10

0.08-0.13

0.19

0.14-0.26

0.31

0.24-0.39

0.41

0.28-0.58

0.63

E 0.41-0.97

0.93

0.68-1.27

1.54

1.11-2.13

1.43

E 0.75-2.73

F

F

  1. Estimates representative for the Canadian general population (based on weighted data).
  2. Mean = Geometric Mean.
  3. E Interpret with caution (high sampling variability; coefficient of variation 16.6%-33.3%).
  4. F Estimate not provided because of extreme sampling variability or small sample size.