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What types of green space disrupt a lonelygenic environment? A cohort study

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Abstract

Introduction

Associations between green space type and social loneliness (a scarcity of people one feels they can depend on) were investigated in city-living participants in the Sax Institute’s 45 and Up Study.

Methods

Availability of green space, tree canopy and open grass were measured as a percentage of land-use within 1.6 km road−network distance buffers using high-resolution data. Multilevel logistic regressions adjusted for confounding tested associations between each green space indicator with the odds of social loneliness at baseline (prevalence) and follow-up (incidence), adjusted for demographic and socioeconomic confounders.

Results

The prevalence of social loneliness at baseline was 5.3% (n = 5627 /105,498). Incidence of social loneliness at follow-up was 3.4% (n = 1772/51,365). Adjusted regressions indicated reduced odds of prevalent (OR = 0.95, 95%CI = 0.92–0.98) and incident social loneliness with 10% more green space (OR = 0.92, 95%CI = 0.90– 0.96). Similar associations were found with a 10% increase in tree canopy for both prevalent (OR = 0.92, 95%CI = 0.88–0.95) and incident social loneliness (OR = 0.92, 95%CI = 0.88–0.97). Two-way interaction terms indicated effect modification by sex but not couple status. Among women, a 10% increase in total green space was associated with lower odds of prevalent (OR = 0.95, 0.91–0.95) and incident (OR = 0.89, 0.85–0.95) social loneliness. A 10% increase in tree canopy among women was associated with lower odds of prevalent (OR = 0.89, 085–0.92) and incident (OR = 0.85, 0.80–0.92) social loneliness. Meanwhile, a 10% increase in open grass among women was associated with higher odds of prevalent (OR = 1.08, 1.01–1.15) and incident (OR = 1.19, 1.03–1.35) social loneliness. Associations for men were statistically significant for a 10% increase in total green space (OR = 0.96, 0.92–0.99) and tree canopy (OR = 0.93, 0.90–0.97) for prevalent social loneliness only.

Conclusion

Urban greening and tree canopy restoration may reduce risks of social loneliness, perhaps especially in women.

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Astell-Burt, T., Walsan, R., Davis, W. et al. What types of green space disrupt a lonelygenic environment? A cohort study. Soc Psychiatry Psychiatr Epidemiol 58, 745–755 (2023). https://doi.org/10.1007/s00127-022-02381-0

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