绿色空间暴露水平对公共健康的影响 机制：一个有调节的中介模型

The Effect of Green Space Exposure Level onPublic Health: A Moderated Mediation Model

关键词:  风景园林  归一化植被指数(NDVI)  公共健康水 平  中介模型  调节变量  作用机制

Key words:  landscape architecture  NDVI  public health level  mediation model  moderating variable  action mechanism

摘要:

健康是全人类共同追求的目标，城市绿色空间在提 高公共健康方面发挥着积极作用，探究二者间的作用机制是基 础且紧要的议题。以全球18个城市为例，通过2017年卫星影 像、统计年鉴和统计报告等获取城市植被覆盖指数、健康水 平、空气质量、医疗资源和经济水平等数据，运用统计学方法 分析城市绿色空间暴露对公共健康水平的影响和作用机制，最 终构建出可调节的中介模型。结果表明：1)城市绿色空间暴露 水平与公共健康水平之间存在显著相关性；2)臭氧是城市绿 色空间与公共健康水平之间的主要中介变量；3)人均GDP是 臭氧在城市绿色空间与公共健康水平之间中介作用中的调节变 量，其强弱程度会影响公共健康。研究结果阐明了城市绿色空 间影响公共健康的主要制约因素，以期为实现全民健康覆盖的 城市人居环境建设提供服务。

Abstract:

Health is the common pursuit of all human beings, and urban green space plays an active role in improving public health. It is a basic and urgent issue to explore the mechanism of action between them. Taking 18 cities around the world as examples, this study uses 2017 satellite images, statistical yearbooks, and reports to obtain data on urban vegetation coverage index, health level, air quality, medical resources, and economic level, and uses statistical methods to analyze the relationship and mechanism between urban green space and public health level, and finally a moderated mediation model. The results show that: 1) There is a significant correlation between the level of urban green space exposure and health level; 2) Ozone is the main mediating variable between urban green space and health level; 3) GDP per capita is a moderating variable in the mediating role of ozone between urban green space and public health levels, and its strength will affect public health. The results of this study clarify the main constraints of urban green space on public health, in order to provide services for the construction of urban living environment for the realization of universal health coverage.