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Lifelong Residential Exposure to Green Space and Attention: A Population-based Prospective Study

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BACKGROUND: Natural environments, including green spaces, may
 have beneficial impacts on brain development. However, longitudinal evidence of an association between long-term exposure to green spaces and cognitive development (including attention) in children is limited.
OBJECTIVES: We evaluated the association between lifelong residential exposure to green space and attention during preschool and early primary school years.
 METHODS: This longitudinal study was based on data from two well-established population-based birth cohorts in Spain. We assessed lifelong exposure to residential surrounding greenness  and tree cover as the average of satellite-based normalized  difference vegetation index and vegetation continuous fields,  respectively, surrounding the child's residential addresses at birth, 4-5 y, and 7 y. Attention was characterized using two computer-based tests: Conners' Kiddie Continuous Performance Test (K-CPT) at 4-5 y (n=888) and Attentional Network Task (ANT) at 7 y (n=987). We used adjusted mixed effects models with cohort random effects to estimate associations between exposure to greenness and attention at ages 4-5 and 7 y. RESULTS: Higher lifelong residential surrounding greenness was associated with fewer K-CPT omission errors and lower K-CPT hit reaction  time-standard error (HRT-SE) at 4-5 y and lower ANT HRT-SE at 7y, consistent with better attention. This exposure was not associated with K-CPT commission errors or with ANT omission or commission errors. Associations with residential surrounding tree cover also were close to the null, or were negative (for ANT HRT-SE) but not statistically significant. 
CONCLUSION: Exposure to residential surrounding greenness was associated with better scores on tests of attention at 4-5 y and 7 y of age in our longitudinal cohort.

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Environmental Health Perspectives, 2017, vol. 125, num. 9, p.097016

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Articles publicats en revistes (ISGlobal)

# metadata.dc.title[].value
Lifelong Residential Exposure to Green Space and Attention: A Population-based Prospective Study