Figure 1: Joint association of parental BMI on infant
birthweight.
The effect of the interaction is illustrated by varying maternal
(A & B ) and paternal BMI (C & D )
with the other parental BMI set at 20 and 35 kg/m2respectively. Grey circles are observed birth weights. Solid red lines
are the median model estimates, dashed lines are 10thand 90th percentiles and dotted lines are the
5th and 95th percentile models. 95%
confidence intervals (blue bars) are presented for parental BMIs of 20
kg/m2, 27.5 kg/m2 and 35
kg/m2. These estimates are for IVF insemination,
vaginal births and female babies and have other continuous covariates
set at their median values.