Figure 1. Distribution of Cognitive and Motor Scores at 4.5 Years by Maternal Level of Education.

Distribution of cognitive (A) and motor (B) scores at age 4.5 years across the cohort divided by maternal level of education. The postgraduate group achieved a mean IQ and a median Movement Assessment Battery for Children (M-ABC2) score higher than the undergraduate degree group and primary or secondary school group (P = .01 and P = .02, respectively). Bars indicate the distribution of the studied variable for the whole cohort. Lines indicate the distribution of the studied variable by maternal level of education. WPPSI-IV indicates Wechsler Primary and Preschool Scale of Intelligence, Fourth Edition.