Results: Greater urinary DAP levels were associated with a poorer performance on intelligence quotient and verbal comprehension domain, with effects being more prominent in boys than in girls. The influence of an increase in
10 ha per year in crop surface around the child's residence during the postnatal period was associated with decreased intelligence quotient, processing speed and verbal comprehension scores. As regards prenatal exposure to pesticides, a poor processing speed performance was observed. These effects were also more prominent in boys than in girls. Conclusions: Our results suggest that postnatal exposure to pesticides can negatively affect children's neuropsycho- logical performance. Prenatal exposure was weakly associated to neurodevelopment impairment