【摘 要】
：
污染浓度对人群健康的影响存在不同滞后性[1-5],本文就污染对北京市某三甲医院2009-2011年消化系统急诊人数的滞后影响进行研究.发病风险随着PM10浓度增加而增加,且影响
【机 构】
：
兰州大学大气科学学院甘肃省兰州市城关区天水南路222号730000中国人民解放军总医院北京100853
【出 处】
：
第六届亚洲特大城市环境与公共健康论坛暨中国环境科学学会环境医学与健康分会2015年会
论文部分内容阅读
污染浓度对人群健康的影响存在不同滞后性[1-5],本文就污染对北京市某三甲医院2009-2011年消化系统急诊人数的滞后影响进行研究.发病风险随着PM10浓度增加而增加,且影响随着滞后时问显著下降.其中200μg/m3以下的PM10对疾病就诊人数并无影响,此后随着浓度增加,危险度呈非线性增大,滞后时间约为一周,8d以后PM10的效应消失.低浓度的PM10污染(＜100μg/m3)在短期滞后时段内无影响,当浓度≥200.μg/m3时,短期临近效应明显.低浓度SO2略有短期效应,随滞后逐渐消失.4d以内的所有SO2浓度对发病基本无影响,4d以后浓度＞55μg/m3的SO2显著增加消化系统疚病发病风险.NO2的效应为：在较短的滞后时间(≤3d),浓度越高危险度越大,此后迅速减小；而低浓度的NO2在滞后4-10d时显著增加发病风险.
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