TABLE 2.
Comparison of case-patients with Campylobacter coli infection and control subjects among participants in a long-distance obstacle adventure race, by food and water exposures — Nevada, October 2012
| Case-patients (n = 22) | Controls (n = 24) | |||
|---|---|---|---|---|
|
|
|
|||
| Exposure | %* | %* | Odds ratio | p-value |
| Inadvertent swallowing of muddy water while competing | 89 | 30 | 19.4 | <0.001 |
| Consumption of potable drinking water provided by race organizers | 100 | 100 | 2.6 | 0.48 |
| Consumption of food provided by race organizers | 93 | 74 | 4.9 | 0.16 |
| Full body submersion in surface water | 94 | 96 | 0.7 | 0.86 |
| Exposure of eyes or mouth to surface water or mud | 100 | 74 | 6.4 | 0.09 |
*
Denominator values varied as a result of nonreporting by some participants.