Analyzing Spatial Distribution Of HIV/AIDS In Xinjiang,2007-2015

Objective: Xinjiang Uygur Autonomous Region(Xinjiang)is one of the province which hard hit by human immunodeficiency virus and Acquired Immune Deficiency Syndrome(HIV/AIDS)in China.Spatial epidemiology methods used to explore and analyze the spatial distribution,Spatial-temporal distribution features and spatial autocorrelation of HIV/AIDS in Xinjiang from 2007 to 2015.Aim to provide reference data for making right targeted prevention and control measures and optimizing disposition of health care.Methods: This research used spatial epidemiology methods as research method,Reporting case of HIV/AIDS in Xinjiang,from2007 to 2015 as the object,Xinjiang as the area and using the map with measuring scale 1:250000 and according the administrative division of Xinjiang by 2008 at county level.ArcGIS10.2 was used to map the reporting rate、identify the spatial clusters、analysis the Globe and Local spatial autocorrelation of HIV/AIDS at county level from 2007 to 2015 in Xinjiang.HIV/AIDS spatial and spatial-temporal clusters were identified by using spatiotemporal scan statistics and Poisson model then were visualized via GIS.Results: The reporting rate of HIV/AIDS in Xinjiang present a rising tendency and has fluctuations 2007 to 2015;Map of HIV/AIDS reporting rate showed the color gradually being dark and the red area increased by the time,it means the case increasing and the area being enlarge.Partial view the north of Xinjiang has high reporting rate and the spatial clusters around Yining,and it shows decreasing trend.But the reporting rate of south of Xinjiang and east of Xinjiang shows increasing trend;The case of every age group was increasing,the proportion of 40 age group increased by the time;Transmission route changed from injecting drug(52.56%)to sexual(50.18%)in 2009,and same-sex sexual transmission increased,from0.43% to 6.94%;The annual global Moran’s I indexes from 2007 to 2015 were all higher than 0,the minimum Z-value was 2.487(all P<0.05),which indicated that positive spatial autocorrelation existed in HIV/AIDS in Xinjiang and there were clusters of HIV/AIDS in Xinjiang.Local spatial autocorrelation analysis revealed that the main cluster types were H-H and L-L.Cluster regions expanded from northern Xinjiang to southern Xinjiang along the artery of traffic with time.There were spatial and spatiotemporal clusters of HIV/AIDS notified incidence in Xinjiang from 2007 through 2015.Among the clusters the first-level cluster areas entered on Yining((1og likelihood ratio(L)=3719.622385,relative risk(RR)=8.83,P<0.00001).The main second-level cluster areas centered on(L =853.818,RR=2.96,P<0.00001)including Shaya、Kuqa、Xinhe cluster time was 2012 to 2015.Conclusion: Spatial autocorrelation and the spatial distribution could be applied to reveal the spatial clusters of HIV/AIDS in Xinjiang.Health departments should strengthen the prevention and control of HIV/AIDS in the areas with spatial clustering of the epidemic.