Volume 13, Number 11—November 2007
Research
Risk Factors for Mycobacterium ulcerans Infection, Southeastern Australia
Tricia Y.J. Quek*, Eugene Athan*†, Margaret J. Henry*, Julie A. Pasco*†
, Jane Redden-Hoare‡, Andrew Hughes*†, and Paul D.R. Johnson*§
, Jane Redden-Hoare‡, Andrew Hughes*†, and Paul D.R. Johnson*§
Table 3
Insect exposure as risk factors for Buruli ulcer on the Bellarine Peninsula, southeastern Australia
| Variable | Case-patients, n (%) | Control-participants, n (%) | OR (95% CI) |
p value |
|---|---|---|---|---|
| Season when frequently bitten by mosquitoes | ||||
| Summer | 24 (49) | 373 (62) | 0.71 (0.39–1.30) | 0.27 |
| Autumn | 16 (33) | 238 (39) | 0.94 (0.49–1.79) | 0.85 |
| Winter | 7 (15) | 37 (6) | – | 0.07† |
| Spring |
12 (25) |
189 (31) |
0.88 (0.44–1.75) |
0.71 |
| Area most often bitten by mosquitoes | ||||
| Head | 18 (37) | 290 (48) | 0.61 (0.33–1.12) | 0.11 |
| Upper arms | 30 (61) | 353 (58) | 1.37 (0.74–2.55) | 0.31 |
| Forearms | 39 (80) | 422 (69) | 2.56 (1.23–5.33) | 0.01 |
| Hands | 28 (57) | 381 (63) | 1.36 (0.71–2.62) | 0.36 |
| Torso | 5 (10) | 128 (21) | 0.48 (0.18–1.23) | 0.13 |
| Upper legs | 8 (16) | 80 (13) | 1.67 (0.73–3.82) | 0.23 |
| Lower legs | 39 (80) | 423 (69) | 2.51 (1.18–5.31) | 0.02 |
| Feet | 11 (22) | 175 (29) | 0.94 (0.45–1.97) | 0.88 |
*OR, odds ratio; CI, confidence interval. OR (95% CI) adjusted for age and location; boldface indicates statistical significance; – indicates that ORs could not be calculated.
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