Volume 9, Number 3—March 2003
Research
Tularemia on Martha’s Vineyard: Seroprevalence and Occupational Risk
Katherine A. Feldman*
, Donna Stiles-Enos†, Kathleen Julian*, Bela T. Matyas‡, Sam R. Telford§, May C. Chu*, Lyle R. Petersen*, and Edward B. Hayes*
, Donna Stiles-Enos†, Kathleen Julian*, Bela T. Matyas‡, Sam R. Telford§, May C. Chu*, Lyle R. Petersen*, and Edward B. Hayes*
Table 2
Risk factors among landscapers (dichotomous variables), Martha’s Vineyard, 2001a
| Potential risk factor | Seropositive among exposed no. (%) | Seropositive among unexposed no. (%) | Prevalence ratio (95% CI) | Yates corrected p value |
|---|---|---|---|---|
| Mow or brush-cut during summer |
12/116 (10.3) |
0/16 (0) |
Undef (undef, undef) |
0.38 |
| Recall mowing or brush-cutting over dead animal |
4/30 (13.3) |
8/79 (10.1) |
1.3 (0.4 to 4.1) |
0.90 |
| Use power blower during summer |
11/72 (15.3) |
1/60 (1.7) |
9.2 (1.2 to 69.0) |
0.02 |
| Ticks crawling on body |
10/112 (8.9) |
2/18 (11.1) |
0.8 (0.2 to 3.4) |
0.89 |
| Ticks attached to skin |
4/73 (5.5) |
8/59 (13.6) |
0.4 (0.1 to 1.3) |
0.19 |
| Seen sick or dead rabbits in past year | 6/60 (10) | 6/71 (8.5) | 1.2 (0.4 to 3.5) | 0.99 |
aCI, confidence interval; undef = undefined.
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