GIS Analysis Of Tuberculosis(TB) Incidence In Jiaonan From 1993 To 2013

Objective To understand variation trend on the incidence and epidemicological characteristics of tuberculosis(TB) in Jiaonan, in order to explore spatial clustering of TB, and provide technical reference for prevention and control of TB.Methods Data of TB incidence were collected from six sub-district offices and eleven towns in Jiaonan from 1993 to 2013. Using SPSS16.0 statistical software to carry on the chi-square test, and to analyze the general characteristics and change rules of TB incidence. GIS(Geographic Information System) technology was used to draw the graph of regional distribution, and analyze the spatial distribution of TB incidence.Results The incidence of TB in Jiaonan from 1993 to 2013 presented fluctuated trend(8.32/100,000~39.02/100,000). There were two peaks and two lows. The incidence of TB was 28.09/100,000 in 1998 and 39.02/100,000 in 2006 and it in 2010 and 2001 was 14.10/100,000 and 13.94/100,000 respectively. There were significant difference between male and female of incidence of TB from 1993 to 2013[χ2(5.380-44.913),P<0.05].Global spatial autocorrelation Moran ’s I showed that the incidence of TB in Jiaonan from 1993 to 2013 exhibited the tendency of aggregation of positive spatial autocorrelation(Moran’ s I = 0.3154, Ζ= 25.10, P<0.01). Local spatial autocorrelation Moran LISA analysis and local hotspots(GetisOrd Gj*) analysis showed that the distribution of TB incidence presented different aggregate type in the administrative area. They were divided into cold and hot spots areas, in which the high-high aggregation was distributed in the north of Poli town, the central part of Zhuhai Sub-District Office and the northern area of Binhai Sub-District Office; the low-low aggregation was distributed in the area of Baoshan town, the northwestern area of Tieshan town and the central area of Li Wuguan town; the high-low aggregation was distributed in the central area of large towns and villages; there was no low-high aggregation distribution area.There was spatial differentiation between the distribution of TB incidence of male and female residents. For male residents, the high-high aggregation distribution area of TB was in the north-central part of Poli town, the north of Binhai Sub-District Office. And the low-low aggregation distribution area was in Baoshan town and the central part of Li Wuguan town. The high-low aggregation distribution area was in the central area of large towns and villages. There was no low-high aggregation distribution area. For female residents, the high-high aggregation distribution area was in the south of Zhushan Sub-District Office, the mid-east region of Zhuhai SubDistrict Office, the north of Binhai Sub-District Office, and the northcentral area of Poli town. The low-low aggregation distribution area was in Baoshan town and the northwest of Tieshan town. There was no high-low and low-high aggregation distribution area.The results from Kriging spatial interpolation suggested that there was a significant north-south high incidence area in the south of Zhushan, Zhuhai, Binhai and Yinzhu Sub-District Offices while in Poli town, Dachang town and Haiqing town, there was a significant east-west high incidence trend. The results of the Trend Surface Analysis(TSA) showed that the incidence of TB presented an increasing trend from the northwest to the southeast. The highest area of incidence of TB was Poli town.Conclusion The incidence of TB in Jiaonan from 1993 to 2013 presented fluctuated trend. The incidence areas might were divided into cold and hot spots, The incidence of TB in Poli was the most epidemiologic area.Effective and comprehensive measures should betaken to prevent and control TB in Jiaonan city.