To investigate the effect of built environment on cardiovascular disease in middle-aged and elderly people.

In this study, 17 256 subjects were selected from China Health and Retirement Longitudinal Study (CHARLS) from 2011 to 2018, and the built environment and meteorological data of their cities were collected. Multivariate logistics regression model and weighted quantile regression model were used to analyze the relationship between built environment and cardiovascular disease in the middle-aged and elderly.

Multivariate logistics regression analysis showed that for every increase of interquartile range (IQR) in land use mixture, residential land, and industrial land, the OR values were 1.13(95%CI: 1.07-1.19), 1.16 (95%CI: 1.10-1.23), and 1.11 (95%CI: 1.06-1.16), respectively. When the proportion of commercial land and green space area increased by 1 IQR, the OR values (95%CI) were 0.88 (95%CI: 0.85-0.92) and 0.94 (95%CI: 0.90-0.98), respectively. The mixed degree of land use, the proportion of residential land, and the proportion of industrial land all increased the risk of cardiovascular disease in men and women (P < 0.05), while the proportion of commercial land decreased the risk of cardiovascular disease in men and women. The green space area only decreased the risk of cardiovascular disease in women (P < 0.05). In the mixed exposure of 8 kinds of built environmental factors, the proportion of industrial land and residential land were 34.13% and 29.20%, respectively.

The built environment has a significant impact on the risk of cardiovascular disease in the middle-aged and elderly, and the area of green space has a more significant effect on the cardiovascular disease in the middle-aged and elderly women.