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Table 2 General description of the clusters with high and low prevalence of HIV, HCV and co-infections among MMT clients in Guangxi (2004 ~ 2014)

From: Spatial distribution of HIV, HCV, and co-infections among drug users in the southwestern border areas of China (2004–2014): a cohort study of a national methadone maintenance treatment program

Type of infection Type of cluster No. of counties/cities Radius (km2) MMT clients No. of infections Relative risk Log likelihood ratio P value
HIV infection High risk cluster 14 11.95 7074 1405 1.80 147.72 <0.001
   2 6.24 627 220 2.79 81.90 <0.001
   2 6.14 708 173 1.91 28.76 <0.001
   1 0.00 1133 466 3.43 230.27 <0.001
  Low risk cluster 7 11.23 2556 74 0.21 156.90 <0.001
   7 8.91 4209 144 0.24 234.95 <0.001
   5 9.29 2366 116 0.36 84.01 <0.001
HCV infection High risk cluster 14 11.95 7074 5626 1.13 30.50 <0.001
   8 9.48 6692 5655 1.22 81.59 <0.001
  Low risk cluster 12 12.01 4224 2392 0.75 90.92 <0.001
   4 7.61 1142 684 0.82 13.80 0.002
   1 0.00 680 381 0.77 14.11 0.008
   1 0.00 342 5 0.02 224.78 <0.001
HIV/HCV co-infection High risk cluster 13 10.95 4888 1008 2.00 156.03 <0.001
   2 6.24 627 201 2.78 74.43 <0.001
   2 6.14 708 160 1.93 27.31 <0.001
   1 0.00 1133 466 3.43 230.27 <0.001
  Low risk cluster 7 8.91 4209 129 0.23 219.66 <0.001
   7 11.32 2556 68 0.21 143.51 <0.001
   5 9.29 2366 102 0.34 81.52 <0.001
   1 0.00 342 0 0.00 25.11 <0.001