Arbex Marcos Abdo, Martins Lourdes Conceição, de Oliveira Regiani Carvalho, Pereira Luiz Alberto Amador, Arbex Flávio Ferlin, Cançado José Eduardo Delfini, Saldiva Paulo Hilário Nascimento, Braga Alfésio Luís Ferreira
Núcleo de Estudos em Epidemiologia Ambiental, Laboratório do Poluição Atmosférica Experimental, São Paulo, Brazil.
J Epidemiol Community Health. 2007 May;61(5):395-400. doi: 10.1136/jech.2005.044743.
To evaluate the association between the total suspended particles (TSPs) generated from preharvest sugar cane burning and hospital admission due to asthma (asthma hospital admissions) in the city of Araraquara.
An ecological time-series study. Total daily records of asthma hospital admissions (ICD 10th J15) were obtained from one of the main hospitals in Araraquara, São Paulo State, Brazil, from 23 March 2003 to 27 July 2004. The daily concentration of TSP (microg/m(3)) was obtained using Handi-vol equipment (Energética, Brazil) placed in downtown Araraquara. The local airport provided the daily mean figures of temperature and humidity. The daily number of asthma hospital admissions was considered as the dependent variable in Poisson's regression models and the daily concentration of TSP was considered the independent variable. The generalised linear model with natural cubic spline was adopted to control for long-time trend. Linear terms were used for weather variables.
TSP had an acute effect on asthma admissions, starting 1 day after TSP concentrations increased and remaining almost unchanged for the next four days. A 10 microg/m(3) increase in the 5-day moving average (lag1-5) of TSP concentrations was associated with an increase of 11.6% (95% CI 5.4 to 17.7) in asthma hospital admissions.
Increases in TSP concentrations were definitely associated with asthma hospital admissions in Araraquara and, despite using sugar cane alcohol to reduce air pollution from automotive sources in large Brazilian urban centres, the cities where sugar cane is harvested pay a high toll in terms of public health.
评估收获前焚烧甘蔗产生的总悬浮颗粒物（TSP）与阿拉拉夸拉市因哮喘导致的住院情况（哮喘住院）之间的关联。
一项生态时间序列研究。从巴西圣保罗州阿拉拉夸拉市的一家主要医院获取了2003年3月23日至2004年7月27日期间哮喘住院（国际疾病分类第十版J15）的每日总记录。使用放置在阿拉拉夸拉市中心的Handi - vol设备（巴西Energética公司）获取TSP的每日浓度（微克/立方米）。当地机场提供每日平均气温和湿度数据。在泊松回归模型中，将哮喘住院的每日数量视为因变量，将TSP的每日浓度视为自变量。采用带有自然立方样条的广义线性模型来控制长期趋势。对天气变量使用线性项。
TSP对哮喘住院有急性影响，在TSP浓度增加1天后开始显现，并在接下来的四天内几乎保持不变。TSP浓度的5天移动平均值（滞后1 - 5）每增加10微克/立方米，哮喘住院人数增加11.6%（95%置信区间为5.4%至17.7%）。
在阿拉拉夸拉市，TSP浓度的增加与哮喘住院人数的增加肯定相关，并且尽管巴西大型城市中心使用甘蔗酒精来减少汽车源的空气污染，但甘蔗种植地区的城市在公共卫生方面付出了高昂代价。
