Table 2.

Metals concentrations according to tertile of the distributions^ˆ.

Metal	Low Tertile	Middle Tertile	High Tertile*
Arsenic, μg/g	0.01 (0.01–0.02)	0.03 (0.02–0.05)	0.14 (0.06–0.98)
Cadmium, μg/g	0.006 (0.003–0.01)	0.04 (0.02–0.09)	0.17 (0.09–0.86)
Lead, μg/g	0.10 (0.008–0.21)	0.40 (0.21–0.60)	2.3 (0.60–17.7)
Manganese, μg/g	0.13 (0.07–0.31)	0.56 (0.33–0.85)	2.2 (0.85–40.4)
Mercury, μg/g	0.01 (0.006–0.02)	0.03 (0.02–0.06)	0.17 (0.07–0.80)
Zinc, μg/g	94.2 (7.7–117.3)	147.9 (117.5–188.9)	648.4 (190.7–10,628.5)
Cumulative Risk Score	0.78 (0–1)	2.0 (2–2)	3.5 (3–6)

^ˆ Cell values are average metals concentration by tertile and (range).

^*For each metal and cumulative risk score, contrasts between low and middle groups with the high tertile group are significantly different (P<0.05).