Figure 3.

A) Odds ratio (squares; values indicated for each quintile) and 95% confidence intervals (vertical bars) for a male child for quintiles 2–5 of maternal serum PCB concentration with the lowest quintile as the reference group. For PCB concentration as a continuous variable, the downward trend was significant (p = 0.02). Adjustment was made 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. B) Odds ratio (squares; values indicated for each quintile) and 95% confidence intervals (vertical bars) for a male child for quintiles 2–5 of paternal serum PCB concentration with the lowest quintile as the reference group. Adjustment was made 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.