Table 2.

Geometric means and geometric standard deviations of metals overall and by NHANES cycle

	Cycle						Overall N = 9664
	2003-2004	2005-2006	2007-2008	2009-2010	2011–2012	2013-2014
	N = 1443	N = 1418	N = 1664	N = 1884	N = 1557	N = 1698
In whole blood
Lead, μg/dL	1.67 (1.92)	1.47 (2.01)	1.49 (1.91)	1.31 (1.95)	1.13 (2.01)	1.01 (1.97)	1.32 (2.00)
Cadmium, μg/L	0.39 (2.27)	0.37 (2.17)	0.39 (2.15)	0.38 (2.13)	0.36 (2.27)	0.33 (2.30)	0.37 (2.22)
Total Mercury, μg/L	0.88 (2.78)	0.96 (2.54)	0.90 (2.58)	1.01 (2.59)	0.94 (2.87)	0.87 (2.70)	0.93 (2.68)
In urine, μg/L
Antimony	0.08 (1.81)	0.07 (2.29)	0.06 (2.15)	0.06 (2.22)	0.05 (2.00)	0.04 (2.36)	0.06 (2.21)
Total Arsenic	8.92 (3.13)	9.91 (3.21)	8.77 (2.99)	10.07 (3.25)	8.81 (3.29)	7.14 (3.06)	8.88 (3.17)
Arsenous acid	0.83 (1.21)	0.87 (1.18)	0.87 (1.21)	0.88 (1.24)	0.45 (1.63)	0.32 (2.84)	0.65 (1.91)
Arsenic acid	0.73 (1.18)	0.73 (1.21)	0.72 (1.17)	0.73 (1.19)	0.64 (1.21)	0.57 (1.13)	0.68 (1.21)
Arsenobetaine	1.77 (5.15)	2.17 (5.81)	1.45 (5.55)	1.82 (6.17)	2.75 (4.31)	2.27 (3.85)	1.99 (5.19)
Arsenocholine	0.41 (1.18)	0.43 (1.21)	0.43 (1.19)	0.44 (1.35)	0.21 (1.41)	0.10 (1.78)	0.30 (1.91)
Dimethylarsonic acid	3.84 (2.20)	4.01 (2.18)	3.88 (2.19)	3.87 (2.39)	4.14 (2.41)	3.46 (2.19)	3.85 (2.27)
Monomethylacrsonic acid	0.82 (1.65)	0.85 (1.56)	0.85 (1.56)	0.83 (1.60)	0.79 (1.55)	0.42 (2.41)	0.73 (1.85)
Barium	1.29 (2.64)	1.33 (2.80)	1.28 (2.71)	1.30 (2.59)	1.07 (2.69)	0.97 (2.79)	1.20 (2.72)
Cadmium	0.29 (2.69)	0.26 (2.74)	0.27 (2.65)	0.25 (2.62)	0.22 (2.78)	0.18 (2.94)	0.24 (2.77)
Cobalt	0.31 (2.24)	0.37 (2.27)	0.35 (2.16)	0.34 (2.28)	0.31 (2.29)	0.37 (2.27)	0.34 (2.26)
Cesium	4.54 (2.08)	4.63 (2.02)	4.38 (1.97)	4.11 (1.94)	3.89 (2.00)	3.92 (1.99)	4.22 (2.00)
Lead	0.70 (2.15)	0.65 (2.43)	0.57 (2.34)	0.53 (2.33)	0.41 (2.45)	0.32 (2.51)	0.51 (2.47)
Molybdenum	38.27 (2.42)	42.97 (2.33)	42.17 (2.43)	40.46 (2.37)	36.95 (2.41)	32.42 (2.47)	38.64 (2.42)
Thallium	0.14 (2.12)	0.15 (2.06)	0.14 (2.06)	0.14 (2.05)	0.15 (2.07)	0.14 (2.14)	0.14 (2.09)
Tungsten	0.06 (2.61)	0.08 (2.74)	0.09 (2.76)	0.07 (2.67)	0.07 (2.69)	0.05 (2.95)	0.07 (2.77)
Uranium	0.01 (2.23)	0.01 (2.63)	0.01 (2.75)	0.01 (2.70)	0.01 (2.44)	0.01 (2.97)	0.01 (2.65)