Figure 1.

Normalized Bayley Scales of Infant Development, 3rd edition (BSID-III) language composite scores at age 2.4 (0.4) years among 101 children in Dataset A (vertical axis), plotted against their mothers’ body mass index (BMI) during the second trimester (horizontal axis). The BSID-III language scores were normalized to 100, by dividing each result by the overall mean of 105.5. The solid line shows the unadjusted relationship (r = -0.30, slope = -61.265, P = 0.0003), while the dashed line shows the relationship after adjusting for Hollingshead score (hhs), child's sex, number of prior births (npb), mother's age and smoking (r = -0.16, slope = -26.644, P = 0.054). The adjustment equation for the expected BSID-III language scores is shown below. Expected score = 109.606-26.644 × log(bmi) + 5.781 × hhs -10.124 × sex-3.724 × npb + 0.603 × age + 9.27 × smoke