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Table 6 Odds ratios* (95% CI) for male child by paternal 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 fathers (n = 108 fathers, 208 children)

Quintile 1

1.00

1.00

1.00

Quintile 2

0.89 (0.37–2.12)

1.49 (0.64–3.46)

2.56 (1.06–6.20)

Quintile 3

1.30 (0.61–2.78)

1.55 (0.74–3.24)

1.01 (0.40–2.56)

Quintile 4

1.30 (0.55–3.08)

1.32 (0.55–3.19)

1.02 (0.40–2.68)

Quintile 5

0.85 (0.32–2.26)

1.23 (0.48–3.11)

1.86 (0.59–5.85)

Excluding fathers whose GLSCF consumption changed a lot (n = 84 fathers, 160 children)

Quintile 1

1.00

1.00

1.00

Quintile 2

0.81 (0.30–2.18)

1.31 (0.51–3.37)

2.07 (0.83–5.12)

Quintile 3

1.21 (0.57–2.58)

1.47 (0.70–3.09)

1.16 (0.44–3.10)

Quintile 4

1.06 (0.40–2.83)

1.14 (0.41–3.21)

1.04 (0.36–3.06)

Quintile 5

0.64 (0.20–2.08)

0.98 (0.34–2.81)

1.67 (0.44–6.28)

Model applied to GLSCF consumers only†, excluding fathers whose GLSCF consumption changed a lot (n = 84 fathers, 160 children)

Quintile 1

1.00

1.00

1.00

Quintile 2

1.59 (0.83–3.05)

1.50 (0.77–2.91)

1.54 (0.78–3.05)

Quintile 3

0.81 (0.41–1.61)

0.92 (0.46–1.87)

1.09 (0.49–2.43)

Quintile 4

1.14 (0.46–2.83)

0.80 (0.32–1.99)

0.92 (0.38–2.22)

Quintile 5

0.78 (0.28–2.18)

0.95 (0.35–2.53)

0.94 (0.31–2.78)

  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.