Table 2.

DDE and PCB^a concentrations in serum, n=123

Organochlorine		Percentile
	Min	10	25	50	75	90	Max
Wet weight measures
DDE (ug/L serum)
Baseline	1.3	3.8	5.8	8.5	12.5	19.8	41.0
Follow-up	0.01	0.5	0.7	1.2	2.3	3.9	11.0
Relative changeb	0.002	0.07	0.10	0.16	0.23	0.29	0.62
PCBs (ug/L serum)
Baseline	0.6	0.9	1.2	1.5	2.1	2.7	5.2
Follow-up	0.2	0.4	0.5	0.7	1.0	1.2	2.2
Relative changeb	0.09	0.25	0.33	0.45	0.65	0.80	1.43
Lipid-adjusted measures
DDE (ug/g lipid)
Baseline	0.3	0.7	1.8	1.7	2.5	3.7	7.4
Follow-up	0.002	0.1	0.1	0.2	0.4	0.5	1.9
Relative changeb	0.002	0.06	0.08	0.12	0.18	0.22	0.56
PCBs (ug/g lipid)
Baseline	0.1	0.2	0.2	0.3	0.4	0.5	0.7
Follow-up	0.03	0.1	0.2	0.1	0.1	0.2	0.3
Relative changeb	0.08	0.21	0.29	0.37	0.51	0.59	0.96

^aPCB concentration comprises PCB-99, 118, 138, 153, 156, 170, 180, and 187

^bRelative change = (follow-up concentration / baseline concentration) among all 123 participants