Volume 12, Number 5—May 2006
Research
Aedes aegypti Larval Indices and Risk for Dengue Epidemics
Table 3
OR for dengue transmission at the optimal cutoff values of the BI, Playa Municipality, Havana, 2000*
| Index and cutoff value† | OR (95% CI) |
|---|---|
| July–August 2000 inspection cycle (before epidemic) | |
| BI per block >0 | |
| September transmission | 2.57 (0.57–11.70) |
| October transmission | 1.69 (0.58–4.94) |
| BI per neighborhood >1 | |
| September transmission | 3.00 (0.66–14.17) |
| October transmission | 1.08 (0.40–2.90) |
| BImax>4 | |
| September transmission | 6.00 (1.09–32.98)‡ |
| October transmission |
1.21 (0.45–3.25) |
| September–October 2000 inspection cycle (during epidemic) | |
| BI per block >0 | |
| October transmission | 3.49 (1.20–10.10)‡ |
| BI per neighborhood >1 | |
| October transmission | 5.06 (1.46–17.38)‡ |
| BImax>4 | |
| October transmission | 3.44 (1.23–9.63)‡ |
*OR, odds ratio; BI, Breteau index; CI, confidence interval; BImax, maximum BI at the block level for each neighborhood.
†Optimal cutoff value determined as specified in Methods.
‡p<0.05.
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