巴西野火产生的细颗粒物和早产风险:一项基于全国人口的队列研究
Yiwen Zhang1, Wenzhong Huang1, Rongbin Xu1
1Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia.
Journal of hazardous materials
|October 30, 2024
概括
野火的烟雾 在野火的烟雾
科学领域:
- 环境健康 环境健康
- 生殖流行病学 生殖流行病学
- 空气污染研究研究
背景情况:
- 野火特有的细颗粒物 (PM2.5) 对健康构成重大风险,可能超过其他PM2.5来源的毒性.
- 了解野火PM2.5对不良分娩结果的影响对于公共卫生至关重要.
- 之前的研究已经将一般的PM2.5暴露与早产有关,但野火特定的影响需要进一步调查.
研究的目的:
- 在巴西全国范围内调查野火特定的PM2.5暴露与早产风险之间的联系.
- 描述暴露-时间-反应关系,并确定易受伤害的子组.
- 量化由于野火导致的PTB的可归因负担PM2.5.5.
主要方法:
- 一项基于全国人口的队列研究,包括巴西超过2200万例出生 (2010-2019).
- 使用化学运输模型估计每日野火特定的PM2.5.
- 适用于可变时间的考克斯比例危险模型,用于暴露-反应分析和子组调查.
主要成果:
- 野火特定的PM2.5增加10μg/m3与PTB危险增加4.7%有关 (HR:1.047,95%CI:1.032-1.063).
- 在怀孕早期观察到更强烈的关联,对于女婴,年轻母亲,少数民族,受过高等教育的妇女,以及特定的地理/社会经济区域.
- 据估计,巴西1.47%的PTB归因于野火PM2.5,这一比例高于归因于非野火PM2.5 (0.31%).
结论:
- 野火特定的PM2.5是巴西早产的重要原因之一,从2010年到2019年,这一趋势在增加.
- 弱势群体因野火烟雾暴露而面临不成比例的更高风险.
- 实施优先级的消防管理和排放控制策略对于预防PTB至关重要.
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