Volume 18, Number 1—January 2012
Dispatch
Dengue Outbreak in Key West, Florida, USA, 2009
Elizabeth G. Radke, Christopher J. Gregory, Kristina W. Kintziger, Erin K. Sauber-Schatz, Elizabeth Hunsperger, Glen R. Gallagher, Jean M. Barber, Brad J. Biggerstaff, Danielle R. Stanek, Kay M. Tomashek, and Carina G.M. Blackmore
Table
Risk factors associated with laboratory-positive dengue virus infection among residents of Key West, Florida, USA, according to household survey, September 2009*
| Variable | No. (%)† persons with infection, n = 13 | No. (%) persons without recent infection, n = 227 | Crude OR (90% CI)‡ |
|---|---|---|---|
| Bird bath in yard | 5 (41) | 26 (11) | 5.6 (1.5–21.3) |
| Windows open >50% of the time | 5 (41) | 37 (15) | 3.9 (1.1–14.0) |
| Vegetation covers >50% of yard | 8 (59) | 61 (30) | 3.4 (1.0–11.2) |
| Outside in evenings | 11 (86) | 149 (67) | 3.1 (1.0–9.5) |
| Bitten by mosquito at work/school | 5 (32) | 28 (14) | 3.0 (1.1–8.2) |
| Uses repellent containing DEET | 3 (20) | 98 (41) | 0.4 (0.1– 0.9) |
| Uses mosquito bite prevention measures | 4 (26) | 119 (52) | 0.3 (0.1–0.7) |
| Air conditioning on >50% of time | 6 (37) | 170 (75) | 0.2 (0.1– 0.6) |
| Traveled outside Florida in past 3 mo | 2 (12) | 93 (38) | 0.2 (0.1–0.9) |
| Empties water from containers regularly | 1 (6) | 79 (36) | 0.1 (0.0–0.7) |
*OR, odds ratio; DEET, N,N-diethyl-m-toluamide.
†Weighted percentages are reported, reflecting the stratified, 1-stage cluster sampling design. Responses were weighted to account for the different probabilities of household inclusion across strata, within-household participation rates, and interhousehold clustering of infections.
‡Significance level, p = 0.10. Weighted logistic regression models were used to assess risk factors for recent infection, and CIs were based on the modeling accounted for the sampling design.
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