Table 1.

Blood and urinary Pb, Hg, and Cd levels and TH levels in the NHANES 2007–2008.

	Adolescents				Adults
	n	Mean	Range	GM	n	Mean	Range	GM
Metal
Blood Pb (µg/dL)	1,009	0.93	0.18–9.20	0.81	4,409	1.75	0.18–33.1	1.43
Total Hg (µg/L)	1,009	0.68	0.20–6.98	0.47	4,409	1.62	0.20–43.9	0.96
Organic Hg (µg/L)	1,005	0.49	0.01–6.73	0.21	4,404	1.31	0.01–42.9	0.61
Blood Cd (µg/L)	1,009	0.29	0.14–4.70	0.21	4,409	0.55	0.14–8.81	0.38
Urinary Cd (µg/g creatinine)	312	0.08	0.01–1.60	0.07	1,455	0.34	0.02–4.04	0.25
TH
TT4 (µg/dL)	1,009	7.46	1.50–18.50	7.34	4,409	7.63	2.00–27.6	7.48
FT4 (ng/dL)	1,009	0.79	0.10–1.50	0.78	4,409	0.77	0.30–4.80	0.76
TT3 (ng/dL)	1,009	130.37	74.00–241.00	128.36	4,409	112.50	37.0–632.0	110.4
FT3 (pg/mL)	1,009	3.64	2.20–6.00	3.61	4,409	3.21	1.90–20.70	3.18
TSH (µIU/mL)	1,009	1.84	0.01–280.76	1.47	4,409	2.01	0.002–80.97	1.60
Tg (ng/mL)	1,009	10.83	0.07–353.56	7.64	4,409	15.62	0.07–4461.00	9.56
GM, geometric mean.