Table 1.

Specific gravity-adjusted urinary metal concentrations^a ($n=262$).

Metals	Minimum	25th percentile	Median	75th percentile	Maximum
Metals included in primary analysis
As ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$)	1.09	4.50	5.81	8.09	325.97
Cd ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$)	$<\text{LOD}$	$<\text{LOD}$	0.14	0.26	1.07
Co ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$)	$<\text{LOD}$	0.39	0.59	0.98	7.51
Hg ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$)	$<\text{LOD}$	0.62	1.02	2.12	16.10
Ni ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$)	$<\text{LOD}$	1.94	2.88	4.38	34.91
Pb ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$)	$<\text{LOD}$	0.50	1.59	3.69	37.89
Tl ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$)	$<\text{LOD}$	0.03	0.07	0.14	0.59
Metals additionally evaluated in exploratory analysisb
Mo ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$)	14.9	42.9	56.8	80.7	359.3
Sb ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$)	$<\text{LOD}$	$<\text{LOD}$	0.08	0.12	0.67
Sn ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$)	$<\text{LOD}$	0.27	0.49	0.97	26.03

Note: As, arsenic; Cd, cadmium; Co, cobalt; Hg, mercury; LOD, limit of detection; Mo, molybdenum; Ni, nickel; Pb, lead; Sb, antimony; Sn, tin; Tl, thallium.

^aValues below the LOD were imputed to the LOD divided by the square root of 2 for all statistical analyses.

^b$n=257$.