In utero exposure to polychlorinated biphenyls is associated with decreased fecundability in daughters of Michigan female fisheaters: a cohort study

Table 1 Variables used to extrapolate serum-OCs at birth in daughters of the Fisheater Family Health Study

Factors used for exposure assessment	n = periods of TUI	Measured in			Median	5 % value	95 % value
Factors used for exposure assessment	n = periods of TUI	1973–74	1979–82	1989–91	Median	5 % value	95 % value
PCB (1973–74) μg/L	2	x			7.0	7.0	7.0
PCB (1973–74) μg/L	12	x	x		8.0	3.0	22.0
PCB (1979–82) μg/L	12	x	x		19.2	1.5	34.6
DDE (1979–82) μg/L	12	x	x		22.7	4.4	51.8
PCB (1979–82) μg/L	56		x		9.1	3.0	47.5
DDE (1979–82) μg/L	56		x		11.1	5.1	34.5
PCB (1979–82) μg/L	171		x	x	8.5	3.1	25.4
PCB (1989–91) μg/L	171		x	x	8.0	4.0	25.7
DDE (1979–82) μg/L	171		x	x	10.3	5.0	29.6
DDE (1989–81) μg/L	171		x	x	6.9	3.4	21.7
PCB (1973–74) μg/L	11	x	x	x	8.0	4.0	15.0
PCB (1979–82) μg/L		x	x	x	16.6	9.9	25.9
PCB (1989–91) μg/L		x	x	x	21.7	5.6	22.7
DDE (1979–82) μg/L	11	x	x	x	18.4	11.6	30.4
DDE (1989–81) μg/L	11	x	x	x	10.8	10.3	14.3
					Mean
Time between measurement and birth (years)	252				16.3	5.5	26.3
Number of siblings	252				1.4	0	4
Years of fish consumption before the birth of the index child	252				3.9	0	23

ISSN: 1476-069X