Table 2.

Urinary UPI, CPI, and CPIII concentrations (μmol/mol creatinine) by organochlorine concentrations in serum and methylmercury in hair of 4-year-old children from Ribera d’Ebre.

	Median (interquartile range)
Compound	No.	Total porphyrins	UPI	CPI	CPIII
HCB (ng/mL)
< 0.78	17	4.0 (2.5–8.1)	2.2 (1.3–2.8)	0.7 (0.2–1.1)	1.7 (0.4–2.8)
0.78–1.40	18	6.8 (2.7–30.6)	2.0 (1.1–4.4)	0.7 (0.2–5.6)	1.5 (0.8–21.8)
> 1.40	17	9.8 (4.6–13.7)	2.2 (1.4–3.0)	1.6 (0.8–3.1)	4.4 (1.2–8.4)
β-HCH (ng/mL)
< 0.20	17	4.0 (2.5–7.2)	2.3 (1.3–2.7)	0.5 (0.2–1.0)	1.2 (0.5–2.7)
0.20–0.37	18	10.0 (4.0–28.5)	2.3 (1.8–3.0)	1.2 (0.5–4.0)	6.1 (1.2–17.8)
> 0.37	17	8.4 (3.4–23.5)	1.7 (1.4–3.1)	1.6 (0.7–3.5)	3.8 (1.0–19.2)*
p,p′-DDE (ng/mL)
< 0.50	17	3.8 (2.2–5.7)	1.6 (1.3–2.5)	0.5 (0.2–1.8)	1.2 (0.5–2.0)
0.50–1.01	18	7.3 (3.6–10.4)	2.3 (1.4–3.2)	1.1 (0.4–8.2)	2.3 (0.8–7.3)
> 1.01	17	13.7 (7.5–33.6)**	2.2 (1.5–3.4)	3.1 (0.8–5.6)**	8.4 (2.6–23.8)**
p,p′-DDT (ng/mL)
< 0.08	39	4.6 (3.0–10.4)	2.1 (1.4–2.7)	0.7 (0.2–1.8)	1.7 (0.6–5.2)
> 0.08	13	10.3 (8.4–30.6)*	3.1 (1.2–4.7)	2 (1.1–5.2)*	7.3 (3.8–21.8)**
PCB-118 (ng/mL)
< 0.10	36	4.3 (2.4–13.7)	1.7 (1.2–2.6)	0.8 (0.2–2.5)	1.7 (0.7–7.6)
> 0.10	16	9.8 (5.4–18.2)*	2.8 (1.9–4.0)*	1.2 (0.7–4.1)	4.5 (1.2–13.2)
PCB-138 (ng/mL)
< 0.10	48	5.9 (3.1–13.3)	2.2 (1.4–3.0)	0.8 (0.3–2.6)	1.9 (0.8–7.2)
> 0.10	4	15.9 (6.5–42.0)	1.7 (0.7–3.2)	3.1 (1.5–5.6)	11.9 (2.7–33.8)
PCB-153 (ng/mL)
< 0.10	21	4.0 (2.5–8.4)	1.8 (1.3–2.7)	0.5 (0.2–1.4)	1.2 (0.5–2.8)
> 0.10	31	8.4 (3.8–27.1)*	2.2 (1.4–3.2)	1.1 (0.6–4.3)*	3.9 (1.0–19.2)*
PCB-180 (ng/mL)
< 0.10	41	5.2 (2.7–12.9)	2.1 (1.3–2.7)	0.8 (0.3–5.2)	1.8 (0.8–7.1)
> 0.10	11	9.8 (4.6–19.6)	3.1 (1.6–4.7)	1.6 (0.8–6.9)	4.0 (0.8–41.7)
Methylmercury (μg/g)
< 0.355	18	7.8 (3.4–39.6)	2.4 (1.6–4.7)	1.1 (0.5–4.9)	2.8 (1.0–29.8)
0.355–0.955	18	4.1 (1.9–10.4)	2.1 (0.5–2.5)	0.5 (0.2–1.6)	1.4 (0.7–5.9)
> 0.955	19	8.7 (3.6–28.5)	1.8 (1.1–2.7)	1.4 (0.2–4.3)	5.1 (0.5–21.9)

^*p < 0.05,

^**p < 0.01 (Kruskal–Wallis test).