Table 4. Space-time clusters of annual crude incidence rate of LV per 100,000 general population.
| Cluster | Time period | Number of municipalities | States | Number of new cases | Expected number of new cases | Annual incidence ratea | RR | LLR |
|---|---|---|---|---|---|---|---|---|
| 1 | 2000–2008 | 465 | Maranhão, Piauí, Ceará, Pernambuco, Bahia | 8,245 | 2,991 | 9.5 | 3.35 | 3598.54 |
| 2 | 2006–2014 | 108 | Ceará, Rio Grande do Norte | 3,210 | 1,957 | 5.7 | 1.71 | 361.24 |
| 3 | 2000–2002 | 32 | Pernambuco, Alagoas | 373 | 63 | 20.4 | 5.94 | 353.06 |
| 4 | 2003–2011 | 1 | Bahia | 94 | 4 | 81.6 | 23.61 | 207.07 |
| 5 | 2000–2001 | 62 | Paraíba, Pernambuco | 355 | 105 | 11.7 | 3.42 | 184.20 |
| 6 | 2004–2006 | 33 | Bahia | 272 | 72 | 13.1 | 3.80 | 162.16 |
| 7 | 2000–2001 | 48 | Rio Grande do Norte | 191 | 43 | 15.3 | 4.44 | 136.30 |
| 8 | 2009–2013 | 7 | Bahia | 88 | 25 | 12.3 | 3.55 | 48.28 |
| 9 | 2000–2000 | 2 | Pernambuco, Alagoas | 22 | 1 | 61.1 | 17.66 | 42.41 |
| 10 | 2000–2000 | 1 | Bahia | 20 | 1 | 53.0 | 15.31 | 35.87 |
| 11 | 2002–2007 | 1 | Bahia | 31 | 5 | 22.8 | 6.60 | 32.18 |
| 12 | 2000–2000 | 3 | Bahia | 15 | 1 | 44.0 | 12.72 | 24.32 |
RR: relative risk for the cluster compared with the rest of the region; LLR: likelihood ratio.
a LV incidence rate (per 100,000 inhabitants) during the clustering time.