Skip to main content

Table 5 Odds ratios* (95% CI) for male child by maternal serum PCB quintile given different decay constants used to revise PCB concentrations.

From: Decreased sex ratio following maternal exposure to polychlorinated biphenyls from contaminated Great Lakes sport-caught fish: a retrospective cohort study.

 

Decay constant

 

0.06

.08

.15

Model applied to all mothers (n = 173 mothers, 173 children)

Quintile 1

1.00

1.00

1.00

Quintile 2

0.39 (0.13–1.19)

0.72 (0.24–2.14)

0.80 (0.26–2.45)

Quintile 3

0.24 (0.07–0.85)

0.40 (0.12–1.35)

0.31 (0.08–1.19)

Quintile 4

0.25 (0.07–0.94)

0.29 (0.07–1.10)

0.13 (0.03–0.65)

Quintile 5

0.11 (0.03–0.49)

0.15 (0.03–0.68)

0.16 (0.02–1.12)

   per unit increase in Log(PCB)

0.53 (0.32–0.88)

0.53 (0.32–0.87)

0.52 (0.31–0.86)

Excluding mothers whose GLSCF consumption changed a lot (n = 128 mothers, 128 children)

Quintile 1

1.00

1.00

1.00

Quintile 2

0.21 (0.05–0.91)

0.36 (0.09–1.48)

0.51 (0.11–2.27)

Quintile 3

0.13 (0.02–0.70)

0.20 (0.04–1.00)

0.18 (0.03–1.05)

Quintile 4

0.14 (0.02–0.89)

0.17 (0.03–1.10)

0.05 (<.01–0.47)

Quintile 5

0.03 (<.01–0.26)

0.05 (0.01–0.37)

0.04 (<.01–0.67)

   per unit increase in Log(PCB)

0.39 (0.20–0.75)

0.38 (0.19–0.75)

0.37 (0.19–0.73)

Model applied to GLSCF consumers only†, excluding mothers whose GLSCF consumption changed a lot (n = 128 mothers, 128 children)

Quintile 1

1.00

1.00

1.00

Quintile 2

0.21 (0.05–0.80)

0.21 (0.06–0.80)

0.24 (0.07–0.85)

Quintile 3

0.34 (0.09–1.32)

0.27 (0.07–1.04)

0.43 (0.12–1.53)

Quintile 4

0.28 (0.07–1.17)

0.37 (0.09–1.54)

0.29 (0.07–1.17)

Quintile 5

0.13 (0.03–0.62)

0.14 (0.03–0.65)

0.28 (0.06–1.41)

   per unit increase in Log(PCB)

0.56 (0.34–0.93)

0.61 (0.39–0.97)

0.74 (0.53–1.05)

  1. * Adjusted for the year of the child's birth, maternal and paternal age at the child's birth, the mother's parity at the child's birth, and whether the child had an older brother. † Serum PCB concentrations of non-GLSCF consumers were left unrevised.