The association between amalgam dental surfaces and urinary mercury levels in a sample of Albertans, a prevalence study

Table 2 Factors associated with urine mercury levels

	Unprovoked mercury (μg/g-creatinine)			Provoked mercury (μg/g-creatinine)
	Effect	95% CI	P	Effect	95% CI	P
Baseline Level	0. 470 μg/g	0.314, 0.627	<0.001	1.73 μg/g	0.657, 2.806	<0.001
Per Surface	0.04 μg/g	0.03, 0.04	<0.001	0.32 μg/g	0.28, 0.35	<0.001
< 74 kg*	0.30 μg/g	0.10, 0.49	0.002	3.41 μg/g	2.11, 4.73	<0.001
74 to 90 kg*	0.15 μg/g	−0.04, 0.34	0.118	1.69 μg/g	0.40, 2.97	0.015
Female vs Male	0.52 μg/g	0.31, 0.63	<0.001	4.14 μg/g	3.04, 5.24	<0.001

* baseline group: >90 kg. Other than the baseline level, the effect indicates the unit increase in mercury level associated with each participant characteristic.