Environmental Pollution 2017; 231(0): 837 - 844

Impact of commuting exposure to traffic-related air pollution on cognitive development in children walking to school.

Alvarez-Pedrerol M, Rivas I, Lopez-Vicente M, Suades-Gonzalez E, Donaire-González D, Cirach M, de Castro M, Esnaola M, Basagana X, Dadvand P, Nieuwenhuijsen M, Sunyer J
A few studies have found associations between the exposure to traffic-related air pollution at school and/or home and cognitive development. The impact on cognitive development of the exposure to air pollutants during commuting has not been explored. We aimed to assess the role of the exposure to traffic-related air pollutants during walking commute to school on cognitive development of children. We performed a longitudinal study of children (n = 1,234, aged 7-10 y) from 39 schools in Barcelona (Catalonia, Spain) who commuted by foot to school. Children were tested four times during a 12-month follow-up to characterize their developmental trajectories of working memory (d' of the three-back numbers test) and inattentiveness (hit reaction time standard error of the Attention Network Test). Average particulate matter