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Spatial Temporal Analysis of Fieldwise Flow in Microvasculature

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Published on: November 18, 2019

Exploring links between greenspace and sudden unexpected death: A spatial analysis.

Jianyong Wu¹, Kristen M Rappazzo², Ross J Simpson³

¹Oak Ridge Institute for Science and Education, US EPA, Office of Research and Development, Research Triangle Park, Durham 27711, NC, USA.

Environment International

|February 9, 2018

Summary

Living near green spaces like forests and greenways may reduce the risk of sudden unexpected death (SUD). This study found that increased greenway density and forest cover were associated with lower SUD incidence, suggesting protective health benefits.

Keywords:

Bayesian spatial model Eco-health Ecosystem services GIS Green space

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Area of Science:

Environmental Health
Epidemiology
Public Health

Background:

Greenspace is linked to various health benefits, but its impact on sudden unexpected death (SUD) is not well understood.
SUD is a significant cause of mortality in the US, particularly among individuals with cardiovascular risk factors.
Potential mechanisms linking greenspace to reduced SUD risk include increased physical activity, stress reduction, and air pollution buffering.

Purpose of the Study:

To investigate the association between greenspace availability and the incidence of sudden unexpected death (SUD).
To explore specific greenspace metrics, such as forest cover and greenway density, in relation to SUD risk.

Main Methods:

Utilized spatial techniques to analyze 396 SUD cases in Wake County, North Carolina (March 2013-February 2015).
Measured greenspace metrics including forest percentage, grassland, tree canopy, and greenway density within census tracts.
Employed Poisson regression and Bayesian spatial models to assess the relationship between SUD incidence and greenspace metrics.

Main Results:

SUD incidence showed an inverse association with greenway density (adjusted RR=0.82) and forest percentage (adjusted RR=0.90).
A 1 km/km² increase in greenway density was linked to an 18% decrease in SUD risk.
A 10% increase in forest cover was associated with a 10% decrease in SUD risk.
No significant inverse relationship was found for grassland, average tree canopy, near-road tree canopy, or tree canopy diversity.

Conclusions:

Greenspace, particularly greenways and forests, may offer protective effects against sudden unexpected death (SUD).
Findings suggest that urban planning incorporating green infrastructure could contribute to public health by reducing SUD risk.
Further research is warranted to confirm causality and elucidate the underlying biological and behavioral mechanisms.