Figure 2. Scatterplot of the Association Between Maternal Plasma Folate Concentration and Child Outcome.

Data are shown for the Social Communication Questionnaire score (range, 0-39 for verbal children and 0-33 for nonverbal children, with a score of ≥13 defined as having autistic traits) of the child at 36 months of age vs the maternal plasma folate concentration during gestational weeks 17 to 19 among women who used antiepileptic drugs in pregnancy. To convert folate concentrations to nanomoles per liter, multiply by 2.266. Diagonal line indicates linear regression analysis.