Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 26, Issue 23, Pages 24272-24285Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-019-05594-0
Keywords
Temperature mortality; Summer; Mental and behavioral disorders; Dementia; Spatiotemporal; Urban environment; Community health
Categories
Funding
- Research Institute for Sustainable Urban Development [1-BBWD]
- Hong Kong Polytechnic University
- Seed Fund for Basic Research from the University of Hong Kong [201903159006]
- Hong Kong Polytechnic University [1-ZE24, 1-ZVN6]
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Temperature is associated with mortality risk across cities. However, there is lack of study investigating the summer effect on mortality associated with mental/behavioral disorders, especially in cities with subtropicalclimate. In addition, summer mortality in subtropical cities is different from tropical cities, and previous studies have not investigated the urban environmental inequality on heat mortality associated with mental/behavioral disorders. A register-based study was developed to estimate the temperature effects on decedents on days with 50(th) percentile of average daily temperature between 2007 and 2014 in Hong Kong (n=133,359). Poisson regression was firstlyapplied to estimate the incidence rate ratio (IRR) from the summer temperature effects on all-cause mortality, cardiovascular mortality, respiratory mortality, and mortality associated with mental/behavioral disorders. For a 1 degrees C increase in average temperatureon days with temperature >= 24.51 degrees C, IRRs of mortality associated with mental and behavioral disorders on lag 0 and lag 1days were 1.033 [1.004, 1.062] and 1.030 [1.002, 1.060], while temperature effects on cardiovascular mortality and respiratory mortality during normal summer days (not extreme heat events) were not significant. A further investigation with linear regression has shown that decedents with mental/behavioral disorders on higher temperature days resided in areas with lower percentage of sky view, lower percentage of vegetation cover, higher level of neighborhood-level PM2.5, higher level of neighborhood-level NO, and higher level of neighborhood-level black carbon (BC). In order to develop protocols for community healthcare based on the Leaving no one behind scheme documented in the 2016 Sustainable Development Goals report of the United Nations, it is necessary to include heat effects on mental/behavioral disorders, especially people with dementia, for community planning and healthcare development.
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