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DOI | 10.1289/EHP5792 |
Sub-Daily Exposure to Fine Particulate Matter and Ambulance Dispatches during Wildfire Seasons: A Case-Crossover Study in British Columbia, Canada | |
Jiayun Yao; Michael Brauer; Julie Wei; Kimberlyn M. McGrail; Fay H. Johnston; Sarah B. Henderson | |
2020-06-24 | |
发表期刊 | Environmental Health Perspectives |
出版年 | 2020 |
英文摘要 | AbstractBackground:Exposure to fine particulate matter () during wildfire seasons has been associated with adverse health outcomes. Previous studies have focused on daily exposure, but levels in smoke events can vary considerably within 1 d. Objectives:We aimed to assess the immediate and lagged relationship between sub-daily exposure to and acute health outcomes during wildfire seasons in British Columbia. Methods:We used a time-stratified case-crossover study design to evaluate the association between modeled hourly and ambulance dispatches during wildfire seasons from 2010 to 2015. Distributed lag nonlinear models were used to estimate the lag-specific and cumulative odds ratios (ORs) at lags from 1 to 48 h. We examined the relationship for all dispatches and dispatches related to respiratory, circulatory, and diabetic conditions, identified by codes for ambulance dispatch (AD), paramedic assessment (PA) or hospital diagnosis (HD). Results:Increased respiratory health outcomes were observed within 1 h of exposure to a increase in . The 48-h cumulative OR [95% confidence interval (CI)] was 1.038 (1.009, 1.067) for the AD code Breathing Problems and 1.098 (1.013, 1.189) for PA code Asthma/COPD. The point estimates were elevated within 1 h for the PA code for Myocardial Infarction and HD codes for Ischemic Heart Disease, which had 24-h cumulative ORs of 1.104 (0.915, 1.331) and 1.069 (0.983, 1.162), respectively. The odds of Diabetic AD and PA codes increased over time to a cumulative 24-h OR of 1.075 (1.001, 1.153) and 1.104 (1.015, 1.202) respectively. Conclusions:We found increased during wildfire seasons was associated with some respiratory and cardiovascular outcomes within 1 h following exposure, and its association with diabetic outcomes increased over time. Cumulative effects were consistent with those reported elsewhere in the literature. These results warrant further investigation and may have implications for the appropriate time scale of public health actions. https://doi.org/10.1289/EHP5792 |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/278043 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Jiayun Yao,Michael Brauer,Julie Wei,et al. Sub-Daily Exposure to Fine Particulate Matter and Ambulance Dispatches during Wildfire Seasons: A Case-Crossover Study in British Columbia, Canada[J]. Environmental Health Perspectives,2020. |
APA | Jiayun Yao,Michael Brauer,Julie Wei,Kimberlyn M. McGrail,Fay H. Johnston,&Sarah B. Henderson.(2020).Sub-Daily Exposure to Fine Particulate Matter and Ambulance Dispatches during Wildfire Seasons: A Case-Crossover Study in British Columbia, Canada.Environmental Health Perspectives. |
MLA | Jiayun Yao,et al."Sub-Daily Exposure to Fine Particulate Matter and Ambulance Dispatches during Wildfire Seasons: A Case-Crossover Study in British Columbia, Canada".Environmental Health Perspectives (2020). |
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