Table 4.

Concentrations of metals in adolescents analyzed.

Heavy metals	Exposed group		Control group		P value
	n.	µg/L	n.	µg/L
Cadmium	210	0.55	29	0.26	<0.0001
Male	111	0.58	16	0.32
Female	99	0.54	13	0.20
P value male versus female	n. s.		0.0009
Chromium	191	1.18	29	1.25	n.s.
Male	102	1.31	16	1.36
Female	89	1.07	13	1.12
P value male versus female	n. s.		n. s.

Data are expressed as geometric means (GM).