Longitudinal analysis of the association between removal of dental amalgam, urine mercury and 14 self-reported health symptoms

Table 1 Summary data for study sample with urine mercury measures

	Treatment group (N=250)	Positive Amalgam group (N=167)	Never Amalgam group (N=538)
% Female	57%	60%	33%
Age	53.7 (9.5)	54.3 (9.0)	46.7 (14.3)
Baseline Hg Overall	1.61 (1.27)	1.67 (1.64)	0.78 (1.43)
Baseline Hg Males Only	1.18 (0.97) [107]	1.42 (1.72) [67]	0.54 (0.77) [358]
Baseline Hg Females Only	1.92 (1.37) [143]	1.85 (1.56) [100]	1.24 (2.14) [180]
% above HBM-1 (proportion)	3.2% (8/250)	3.0% (5/167)	0.9% (5/538)
Number of Amalgam Surfaces at Baseline	18.4 (12.9)	23.7 (13.8)	0 N/A

Baseline values of average urine mercury measures (μg/g-creatinine) overall, for males and females across all amalgam groups. Percent above the established HBM-I risk level of 5 μg/g-creatinine overall for each group. Arithmetic mean (standard deviation) [number of observations], unless otherwise specified.

ISSN: 1476-069X