Table 2.
Risk Factors by Endemic Area
| EIA 1.6 | ||||||
|---|---|---|---|---|---|---|
| Endemic | Non-endemic | All | ||||
| n=31 | n=6 | n=37 | ||||
| Travel to Endemic State in Prior Month | 7 | 22.6% | 0 | 0.0% | 7 | 18.9% |
| Travel to Endemic State in Prior Year | 14 | 45.2% | 0 | 0.0% | 14 | 37.8% |
| Outdoor lifestyle | 24 | 77.4% | 4 | 66.7% | 28 | 75.7% |
| Hiking | 10 | 32.3% | 2 | 33.3% | 12 | 32.4% |
| Camping | 8 | 25.8% | 2 | 33.3% | 10 | 27.0% |
| Hunting | 0 | 0.0% | 1 | 16.7% | 1 | 2.7% |
| Tick bite | 8 | 25.8% | 0 | 0.0% | 8 | 21.6% |
| Tick exposure | 14 | 45.2% | 1 | 16.7% | 15 | 40.5% |
| Post-outdoor rash | 3 | 9.7% | 0 | 0.0% | 3 | 8.1% |
| Post-outdoor symptoms | 6 | 19.4% | 2 | 33.3% | 8 | 21.6% |
| Contact with person with post-outdoor symptoms* | 8 | 25.8% | 1 | 16.7% | 9 | 24.3% |
| History of Lyme Disease | 5 | 16.1% | 0 | 0.0% | 5 | 13.5% |
*
The question relates to reported symptoms and signs of tick borne illness in a friend or family member; while not specific, an affirmative answer may be used as a crude proxy for exposure risk in the donor given potential for shared activities (e.g. hiking, hunting)