Table 2.

Distribution of urinary uroporphyrines (μmol/L) and serum concentrations of organochlorinated compounds (ng/mL) (n = 241 subjects)

	% detectable	Percentiles among detectables
		Min	p25	p50	p75	Max
Total porphyrins	100%	13.0	63.8	98.5	157	497
Uro I	36%	2.0	6.0	10.0	16.0	37.0
Uro III	2%	1.0	1.0	1.0	8.0	8.0
Hepta I	1%	2.0	2.0	2.5	3.0	3.0
Hepta III	6%	2.0	2.8	4.0	6.8	13.0
Copro I	76%	1.0	4.0	7.0	14.0	134
Copro III	86%	2.0	10.0	21.5	37.0	154
HCB	100%	2.30	13.2	21.7	37.9	1616
DDE	97%	0.1	2.59	6.15	14.4	67.4
Total PCBs†	94%	0.2	1.89	3.78	7.02	143
CB-138	87%	0.1	0.58	1.03	1.85	35.0
CB-153	85%	0.1	0.67	1.18	2.32	40.9
CB-180	89%	0.1	0.58	1.43	2.66	63.5

Uro: uroporphyrins; Hepta: heptaporphyrins; Copro: coproporphyrins. † PCBs = Σ (28, 52, 101, 118, 138, 153, 180) congeners