Residential Greenspace and Early Childhood Development and Academic Performance : A Longitudinal Analysis of Australian Children Aged 4-12 Years

Introduction : Exposure to greenspaces have beneficial effects on children’s mental health and development. This study explores the association between residential exposure to greenspace and early childhood development and academic outcomes. Methods: Children were from Mothers and their Children’s Health (MatCH) study, a sub-study of the Australian Longitudinal Study on Women’s Health. We obtained data on early childhood development from the Australian Early Development Census (AEDC), a population-wide census data (median age: 5.3 years, n=936 children). Academic performance relative to the national minimum standard (NMS) (i.e., in reading, writing, grammar and punctuation, spelling, and numeracy) of children with Year 3 and 5 data were from the ‘National Assessment Program – Literacy and Numeracy’ (NAPLAN) (n=1,679 children). Annual exposure to green and non-green vegetation was measured using the Normalized Difference Vegetation Index (NDVI) and fractional cover of non-photosynthetic vegetation (fNPV), respectively, within 100 m and 500 m buffer around maternal residential address. We calculated greenspace exposure at the year of test and average exposure throughout childhood. Greenspace exposures were standardised and odds ratio (ORs) with 95% confidence intervals (95% CI) were estimated using generalised estimating equation models, adjusting for potential confounders. Results: Exposure to fNPV within 500 m buffer of homes at the year of test and during child’s lifetime was associated with academic scores below/at NMS at Year 3 (baseline) and Year 5 (follow-up) for the domains of reading, writing, and grammar and punctuation. Surrounding residential greenness was not significantly associated with NAPLAN scores. No association was found between residential greenspace and developmental vulnerability on one or more AEDC domains across both exposure windows. Conclusion: Our study revealed that long-term and short-term exposure to non-green vegetation around homes is linked to poor academic performance in children. Further research on fNPV are required to verify these findings, with additional longitudinal studies