Abstract：
With an increasing aging population in many cities worldwide, promoting and maintaining the health of elderly individuals has become a pressing public health issue. Although greenspaces may deliver many health outcomes for the elderly population, existing evidence remains inconsistent, partly due to discrepancies in the measure of greenspace and health outcomes. In addition, few studies examined the effect of greenspace exposure on life expectancy at the individual level. Thus, this study comprehensively investigated the association between greenspace exposure and life expectancy among elderly adults in Guangzhou, China, based on the individual-level mortality dataset. The data were analyzed at both the individual level and aggregate level, and two types of buffers (straight-line vs. street-network buffer) were used to define individual greenspace exposure. After controlling for the random effects and multiple types of covariates, we found that 1) elderly individuals with higher greenspace exposure were associated with an increased life expectancy; 2) elderly individuals with lower socioeconomic status benefit more from greenspace (i.e., equigenesis hypothesis); 3) different greenspace measurements lead to different results; 4) greenspace had the highest effects on life expectancy and equigenesis within the street-network buffer distances of 3000 m and 2500 m, respectively. This study underscores the potential health benefits of greenspace exposure on elderly individuals and the importance of provision and upkeep of greenspace, especially among socially disadvantaged groups.
摘要：
随着全球许多城市人口老龄化的加剧，促进和维护老年人的健康已成为紧迫的公共卫生问题。虽然绿地可以为老年人带来许多健康结果，现有证据仍然不一致，部分原因是绿色空间和健康结果的衡量标准存在差异。此外,很少有研究从个人层面研究了绿地暴露对预期寿命的影响。因此，本研究全面调查了广州市老年人绿地暴露与预期寿命的关系,中国,基于个人水平的死亡率数据集。数据在个体水平和总体水平上进行了分析，和两种类型的缓冲区(直线与街道网络缓冲区)用于定义单个绿色空间暴露。在控制了随机效应和多种类型的协变量之后，我们发现，1)绿色空间暴露较高的老年人与预期寿命增加有关；2)社会经济地位较低的老年人从绿色空间中受益更多(即，等生假设）；3）不同的绿色空间测量导致不同的结果；4）绿色空间对3000m和2500m的街道网络缓冲距离内的预期寿命和等生影响最大，分别。这项研究强调了绿色空间暴露对老年人的潜在健康益处，以及提供和维护绿色空间的重要性，特别是在社会弱势群体中。
