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Volume 14, Number 2—February 2008
Research

Effectiveness of Personal Protective Measures to Prevent Lyme Disease

Marietta Vázquez*Comments to Author , Catherine Muehlenbein*, Matthew L. Cartter†, Edward B. Hayes‡, Starr Ertel†, and Eugene D. Shapiro*
Author affiliations: *Yale University School of Medicine, New Haven, Connecticut, USA; †State of Connecticut Department of Public Health, Hartford, Connecticut, USA; ‡Centers for Disease Control and Prevention, Fort Collins, Colorado, USA;

Main Article

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.

Main Article

Page created: July 08, 2010
Page updated: July 08, 2010
Page reviewed: July 08, 2010
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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