The Effects of Traffic Air Pollution in and around Schools on Executive Function and Academic Performance in Children: A Rapid Review.

This review summarises the extant literature investigating the relation between traffic-related air pollution levels in and around schools and executive functioning in primary-school-aged children. An electronic search was conducted using Web of Science, Scopus, and Education Literature Datasets databases (February 2020). Review articles were also searched, and forwards and backwards searches of identified studies were performed. Included papers were assessed for quality. We included 9 separate studies (published in 13 papers). Findings suggest that indoor and outdoor particulate matter with a diameter of 2.5 µm or less (PM2.5) negatively influences executive function and academic achievement and that indoor and outdoor nitrogen dioxide (NO2) adversely affects working memory. Evidence for the effects of particulate matter with a diameter of 10 µm or less (PM10) is limited but suggests potential wide-ranging negative effects on attention, reasoning, and academic test scores. Air pollution in and around schools influences executive function and appears to impede the developmental trajectory of working memory. Further research is required to establish the extent of these effects, reproducibility, consequences for future attainment, and place within the wider context of cognitive development.

Role of environmental factors in autism spectrum disorders in Saudi children aged 3-10 years in the Northern and Eastern regions of Saudi Arabia.

OBJECTIVE: To study the environmental factors which can contribute to the development of autism spectrum disorders in Saudi children aged 3-10 years in Northern region (Arar) and Eastern region (Dammam) in the Kingdom of Saudi Arabia. METHODS: A case control study was conducted and the data was collected from September 2017 to December 2017 by interviewing the parents of 100 Saudi autistic children and 100 normal children aged 3-10 years from Arar and Dammam. A specially designed questionnaire was used to collect the data which includes socio-demographic characteristics of the parents and ante-natal history of the mother and developmental history, social history and dietary habits of the child. To find out the association between environmental factors and development of autism in children, logistic regression with odds ratio used. RESULTS: There was a significant association between consanguineous marriages and autism. A significant association was also found between medications taken by the mother during pregnancy and autism. Significantly lowered ORs for Autism were observed for children in families of perceived adequate income and children consuming a Vitamin-D rich diet. Increased maternal age was observed in autistic children when compared to normal children. CONCLUSION: he environmental factors which could contribute to the development of autism are consanguineous marriage, inadequate family income, medications taken by the mother during pregnancy, vitamin D deficient diet of the child and maternal age during pregnancy.