Volume 14, Number 2—February 2008
Research
Effectiveness of Personal Protective Measures to Prevent Lyme Disease
Marietta Vázquez*
, Catherine Muehlenbein*, Matthew L. Cartter†, Edward B. Hayes‡, Starr Ertel†, and Eugene D. Shapiro*
, Catherine Muehlenbein*, Matthew L. Cartter†, Edward B. Hayes‡, Starr Ertel†, and Eugene D. Shapiro*
Table 4
Risk factors for Lyme disease, Connecticut, July 2000 through February 2003
| Risk factors | Case-patients, no. (%) | Matched controls, no. (%) | Odds ratio* (95% CI†) | p value |
|---|---|---|---|---|
| Having an occupational exposure | ||||
| Definite | 68 (15) N = 462 | 80 (11) N = 699 | 1.4 (0.9–2.0) | 0.074 |
| Definite and possible | 87 (15) N = 566 | 109 (13) N = 866 | 1.2 (0.9–1.6) | 0.32 |
| Unlikely |
38 (28)
N = 136 |
27 (12)
N = 222 |
3.1 (1.6–5.9) |
0.0007 |
| Engaging frequently in outdoor activities | ||||
| Definite | 400 (86) N = 467 | 598 (83) N = 724 | 1.2 (0.9–1.7) | 0.26 |
| Definite and possible | 489 (85) N = 572 | 745 (83) N = 898 | 1.2 (0.9–1.6) | 0.34 |
| Unlikely |
117 (85)
N = 137 |
197 (86)
N = 230 |
0.9 (0.5–1.7) |
0.78 |
| Living close to grassy or heavily wooded area | ||||
| Definite | 444 (95) N = 467 | 676 (93) N = 724 | 1.4 (0.8–2.3) | 0.23 |
| Definite and possible | 546 (95) N = 572 | 841 (94) N = 898 | 1.4 (0.9–2.3) | 0.18 |
| Unlikely |
131 (96)
N = 137 |
218 (95)
N = 230 |
0.9 (0.3–2.6) |
0.89 |
| Having pets at home | ||||
| Definite | 283 (73) N = 386 | 488 (72) N = 681 | 1.2 (0.9–1.7) | 0.17 |
| Definite and possible | 355 (75) N = 472 | 599 (71) N = 838 | 1.2 (0.9–1.6) | 0.17 |
| Unlikely | 81 (77) N = 105 | 151 (72) N = 210 | 1.4 (0.8–2.6) | 0.27 |
*All estimates were adjusted for possible confounders (sex, race, receipt of Lyme vaccine, and use of other personal protective measures) with conditional logistic regression.
†CI, confidence interval.
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Page updated: July 08, 2010
Page reviewed: July 08, 2010
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