Table 2. Clusters of dengue fever by autochthonous and overseas acquired cases in Queensland, Australia, 2010–2015.
| Spatio temporal | Cluster | Radius (Km) |
Start date | End date | No. of SLAs | LLR | O (n) | E(n) | P value | RR |
|---|---|---|---|---|---|---|---|---|---|---|
| Autochthonous | 1 | 225.830 | 2013/1/1 | 2015/12/31 | 50 | 1047.14 | 460 | 29.55 | 0.001 | 54.52 |
|
Overseas |
1 | 0 | 2012/1/1 | 2013/12/31 | 1 | 31.19 | 10 | 0.17 | 0.001 | 60.81 |
| 2 | 0 | 2012/1/1 | 2014/12/31 | 1 | 28.56 | 6 | 0.02 | 0.001 | 317.29 | |
| 3 | 36.72 | 2012/1/1 | 2014/12/31 | 9 | 25.42 | 59 | 20.05 | 0.001 | 3.05 | |
| 4 | 26.27 | 2012/1/1 | 2014/12/31 | 26 | 24.09 | 92 | 41.37 | 0.001 | 2.33 | |
| 5 | 6.36 | 2013/1/1 | 2015/12/31 | 39 | 18.21 | 76 | 35.41 | 0.001 | 2.23 | |
| 6 | 4.70 | 2013/1/1 | 2015/12/31 | 2 | 17.18 | 17 | 2.68 | 0.001 | 6.43 |
RR, Relative Risk; LLR, Log Likelihood Ratio; O, observed cases; E, expected cases; p value, significant at 5% confidence interval.