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| Effects of Long-term Sand Dust Pollution on Pulmonary Function of Exposed Population |
| Wang Jinyu1,2, Li Sheng3, Wang Shigong4, Shang Kezheng4 |
1. College of Earth and Environmental Science, Lanzhou University, Lanzhou 730000, China;
2. School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China;
3. Lanzhou Center for Disease Prevention and Control, Lanzhou 730030, China;
4. College of Atmospheric Sciences/Gansu Key Laboratory of Arid Climate Change and Reducing Disaster/Center for Meteorology Environment and Public Health, Lanzhou University, Lanzhou 730000, China |
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Abstract In order to analyze the effects of Long-term sand dust pollution on pulmonary function of exposed population, Minqin County was selected as sand dust pollution region, where dust storm occurred frequently. Meanwhile, Pingliang City was selected as control area, where was influenced by dust weather rarely. The subjects were consisted of 728 farmers (Minqin, 424; Pingliang, 304) aged 40yrs or older. Farmers having documented occupational history to industrial dust exposure were not included. Using SPIROVIT SP-1 spirometer, we measured lung function (forced expiratory volume in 1 s [FEV1], forced vital capacity [FVC], FEV1/FVC) of farmers. Lung function impairment were divided into three categories including obstructive lung function impairment (FEVl/FVC<70%), restrictive lung function impairment (FVC%<80%) and combined lung function impairment (FEVl/FVC<70% and FVC%<80%).For non-smokers, the values of FEV1% and FEV1/FVC significantly decreased by 4.3% and 6.6% in Minqin County compared with that in Pingling City, respectively; while the incidences (RR, 95%CI) significantly increased by 9.5% (1.540, 1.106-2.144), 9.2% (1.955, 1.242-3.076) and 3.2% (8.677, 1.128-66.734) in abnormal lung function, obstructive lung functions impairment and combined lung functions impairment, respectively. The results also showed, compared with in Pingliang City, the incidence in Minqin County was significantly ascendant in the obstructive lung function impairment for farmers aged 50-59 years, and the incidence in Minqin County apparently increased in abnormal lung function, obstructive lung function impairment and combined lung function impairment for farmers aged 60 years or older. For females, there was significantly ascendant occurrences of obstructive lung function impairment and combined lung function impairment in Minqin County compared with that in Pingling City, while only the incidence of abnormal lung function increased for males. Thus, we conclude that long-term sand dust exposure can do damage to human lung function, which displays mainly obstructive pulmonary lung deficit. Those people aged 50 years or older were the major victims. To decrease the lung function injure, the exposed population were suggested to reduce the dust exposed chances and enhance the protective measures.
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Received: 05 August 2013
Published: 20 July 2014
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Corresponding Authors:
王式功（Email：wangsg@lzu.edu.cn）
E-mail: wangsg@lzu.edu.cn
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2014, Vol. 34 
