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Table 1 Summary data for study sample with urine mercury measures

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

  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
  1. 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.