Association between Tree Pollen Counts and Asthma ED Visits in a High-Density Urban Center
Association between Tree Pollen Counts and Asthma ED Visits in a High-Density Urban Center
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DOI：
10.3109/02770903.2011.567427
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发表时间：
2011-06-01
影响因子：
1.9
通讯作者：
Rosenstreich, David
中科院分区：
文献类型：
--
作者：
Jariwala, Sunit P.;Kurada, Satya;Rosenstreich, David
背景哮喘恶化模式本质上是周期性的，并且通常与空气颗粒浓度相关。Objective.在哮喘高发区（布朗克斯的纽约市区），研究儿童和成人哮喘相关急诊（艾德）就诊与室外空气质量之间的关系。方法.从七家主要的布朗克斯医院获得了一年（1999年）内每日哮喘相关成人和儿童艾德就诊的数量。氮氧化物（NOx），臭氧（O-3），二氧化硫（SO2）和花粉计数的每日值。结果哮喘相关的艾德就诊人数在12月至1月最高，7月最低。哮喘艾德就诊增加有三个明显的高峰：冬季（12月至1月）、春季（4月下旬至5月）和秋季（10月）。春季高峰是最引人注目的，与高树花粉计数（树花粉：r = 0.90，p = 0.03）。我们观察到冬季哮喘艾德就诊与SO2和NOx水平呈正相关。冬季峰值的SO2和NOx在12月初出现之前的冬季哮喘高峰。结论.春季哮喘高峰与树木花粉数量增加密切相关，此时哮喘增加可能是由于对花粉的过敏反应。没有明显的关联可以建立与下降高峰。冬季峰值与SO2和NOx水平升高相关。
Background. Asthma exacerbation patterns are cyclic in nature and often correlate with air particle concentrations. Objective. To examine the relationship between asthma-related emergency department (ED) visits and outdoor air quality for pediatric and adult patients in a high asthma prevalence area, the New York City borough of the Bronx. Methods. Numbers of daily asthma-related adult and pediatric ED visits during one complete year (1999) were obtained from the seven major Bronx hospitals. Daily values of nitrogen oxides (NOx), ozone (O-3), sulfur dioxide (SO2), and pollen counts were acquired. Results. Asthma-related ED visit numbers were highest in December-January and lowest in July. There were three distinct peaks of increased asthma ED visits: winter (December-January), spring (late April-May), and fall (October). The spring peak was the most striking and coincided with high tree pollen counts (tree pollen: r = 0.90, p = .03). We observed a positive correlation between asthma ED visits in the winter and SO2 and NOx levels. Winter peaks of SO2 and NOx in early December appeared to precede the winter asthma peak. Conclusions. The spring asthma peak is closely associated with increased tree pollen counts, and the asthma increase at this time is likely due to allergic reactions to pollen. No significant associations could be established with the fall peak. The winter peak correlates with elevated SO2 and NOx levels.