Table 2 Spatial clustering of TB incidents in Qinghai, China, 2009–2016
Cluster type | Coordinates/Radius | N | Cluster counties | Observed cases | Expected cases | RR | LLR | P-value |
|---|---|---|---|---|---|---|---|---|
Most likely cluster | (33.48 N, 99.41 E)/184.91 km | 6 | Dari, Gande, Maqin, Banma, Jiuzhi, Maduo | 5408 | 1488.94 | 3.97 | 3225.58 | <0.001 |
Secondary cluster 1 | (34.86 N, 95.13 E)/229.73 km | 4 | Qumalai, Chengduo, Zaduo, Zhiduo | 5244 | 1410.00 | 4.05 | 3215.65 | <0.001 |
Secondary cluster 2 | (32.17 N, 96.13 E)/97.79 km | 2 | Yushu, Nangqian | 4728 | 1674.66 | 3.02 | 1956.35 | <0.001 |
Secondary cluster 3 | (36.07 N, 102.23 E)/0 km | 1 | Hualong | 2530 | 1838.12 | 1.40 | 121.59 | <0.001 |
Secondary cluster 4 | (35.51 N, 99.73 E)/107.12 km | 3 | Xinghai, Tongde, Guinan | 2422 | 1815.02 | 1.35 | 95.75 | <0.001 |
Secondary cluster 5 | (35.43 N, 102.08 E)/0 km | 1 | Tongren | 1106 | 780.65 | 1.43 | 61.08 | <0.001 |
Secondary cluster 6 | (38.32 N, 99.70 E)/96.82 km | 2 | Qilian, Gangcha | 1063 | 768.15 | 1.39 | 51.40 | <0.001 |
Secondary cluster 7 | (37.46 N, 101.70 E)/0 km | 1 | Menyuan | 1451 | 1291.45 | 1.13 | 9.75 | <0.001 |
Secondary cluster 8 | (35.90 N, 101.85 E)/0 km | 1 | Jianza | 573 | 475.97 | 1.21 | 9.38 | <0.001 |