Analysis of spatial autocorrelation of HIV infections and patients in Zhaoyang District from 1997 to 2014
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摘要: 目的 探讨和分析云南省昭通市昭阳区人类免疫缺陷病毒(human immunodeficiency virus,HIV)感染者和患病者空间自相关及空间分布特征,并分析报告病例热点区域随时间的变化趋势。方法 对昭阳区1997-2014年报告的HIV感染者和患者进行全局空间自相关分析和局部空间自相关分析。结果 2002年以后,历年全局Moran's I值均>0,均有统计学意义(均有P<0.05),提示昭阳区HIV感染者和患者空间自相关为正相关,存在聚集性。局部空间自相关分析显示,昭阳区HIV感染者和患者聚集性逐年增大,热点区域逐年增加。双变量全局自相关分析显示,2003年以来昭阳区历年新报告HIV感染者空间聚集性与经异性性接触HIV感染者呈正相关。结论 昭阳区HIV感染者和患者分布以城区和城乡结合部为热点,并且以异性性接触传播为主要传播方式逐年向周边乡村蔓延。今后应加强对城区和城乡结合部等热点区域进行艾滋病监测和干预,防止热点区域的扩大和HIV/AIDS的蔓延,同时应加强对农村地区艾滋病的宣传教育。Abstract: Objective To explore and analyze spatial autocorrelation and the spatial distribution features of HIV/AIDS in Zhaoyang District, Yunnan province, and discuss the trend of variation with time for the HIV/AIDS cases clustering areas. Methods The reported cases of HIV/AIDS of Zhaoyang District from 1997 to 2014 were collected, and the global spatial autocorrelation analysis and the local spatial autocorrelation analysis were conducted by the method from spatial statistics. Results The annual global Moran's I indexes from 2002 to 2014 were higher than 0 (all P<0.05), which indicated that positive spatial autocorrelation existed in HIV/AIDS in Zhaoyang District and there were clusters of HIV/AIDS in Zhaoyang District. Local spatial autocorrelation analysis revealed that the hot-spot regions expanded with time. Bivariate global spatial autocorrelation analysis indicated that the cluster of annual reported HIV infetions correlated with the increased numbers of annual reported HIV infections via heterosexual transmission. Conclusions The hot-spot regions were in the urban and sub-urban areas of Zhaoyang District that had been expanding to surrounding neighbored villages and towns by heterosexual transmission gradually. For the further prevention and control of the hot-spot regions expanding, it is necessary for us to reinforce the surveillance and propaganda in both hot-spot regions and other towns, while strengthen the awareness and education of HIV in rural areas.
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Key words:
- HIV /
- Epidemiologic studies /
- Infection
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