Changes on Stroke Burden Attributable to Ambient Fine Particulate Matter in China

Area of Science:

• Environmental Health
• Epidemiology
• Public Health Policy

Background:

• China has implemented air pollution control policies over recent decades.
• Ambient fine particulate matter (PM_2.5) is a significant risk factor for stroke.
• Assessing the health impacts of these policies on stroke burden is crucial.

Purpose of the Study:

• To evaluate the health effects of Chinese air quality policies on stroke burden attributed to ambient PM_2.5.
• To analyze trends in stroke disability-adjusted life years (DALYs) related to PM_2.5 exposure from 1990 to 2019.

Main Methods:

• Utilized Joinpoint regression analysis.
• Employed data from the Global Burden of Disease 2019 study.
• Examined age-standardized DALY rates for stroke and its subtypes (ischemic stroke, intracerebral hemorrhage, subarachnoid hemorrhage).

Main Results:

• Age-standardized DALY rates for PM_2.5-attributable stroke in China increased until 2012, then decreased by -1.98% annually (2012-2019).
• Ischemic stroke DALYs doubled by 2014 and decreased by -0.83% annually (2014-2019).
• Intracerebral hemorrhage DALYs increased until 2003, then declined, while subarachnoid hemorrhage DALYs generally decreased throughout the study period.

Conclusions:

• The study clarifies dynamic changes in PM_2.5-attributable stroke burden in China.
• Results highlight the positive health effects of air quality improvement policies.
• Demonstrates a significant reduction in stroke burden linked to improved air quality.