美国20个州的野火和非野火PM2.5的心肺住院风险
Min Zhang1, Edgar Castro2, Minghao Qiu3,4
1Department of Environmental Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
野火细颗粒物 (PM2.5) 对心肺健康的风险比非野火PM2.5.5更大. 缓解策略应优先考虑减少野火烟雾暴露.
科学领域:
- 环境健康 环境健康
- 流行病学 流行病学
- 毒理学 毒理学 毒理学
背景情况:
- 美国的野火活动正在增加,导致人们更容易接触细颗粒物 (PM2.5).
- 与非野火PM2.5相比,评估野火特定的PM2.5对健康的影响和相对毒性对于公共卫生至关重要.
- 了解这些风险有助于制定有效的缓解策略.
研究的目的:
- 调查长期暴露于野火特异性和非野火PM2.5和心肺住院风险之间的关联.
- 为了比较野火特定的PM2.5与非野火PM2.5.5的相对毒性.
主要方法:
- 采用了强于混的自我控制设计,分析了美国20个州 (从2006年至2019年) 超过8900万例心肺住院病例.
- 基于住宅邮政编码来评估暴露的野火特异性和非野火PM2.5的估计两年平均度.
- 使用诊断码识别了因心血管和肺部疾病住院的病例.
主要成果:
- 两年内每增加1μg/m3的野火特异性PM2.5显著与所有心肺疾病的住院风险增加有关 (相对风险为1.100-1.160).
- 非野火PM2.5也增加了住院的风险 (相对风险为1.047-1.085),但比野火PM2.5.5的风险要小.
- 在少数群体,肥胖或糖尿病患者以及贫困社区的人群中观察到更强烈的影响.
结论:
- 与来自其他来源的PM2.5相比,长期暴露于野火特定的PM2.5对心肺住院的风险更大.
- 建议加强野火管理,侧重于除传统空气质量控制外,还要减少烟雾.
- 这些发现凸显了针对性公共卫生干预和政策变革的迫切需要.
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