Trend (within 90% CI) for the patient group
| Parameter | OR (95% CI) | p Value |
| Bad weather/visibility (vs good weather/visibility) | 2.56 (0.89 to 7.39) | 0.0818 |
| Seasonal checking of skiing equipment (vs no seasonal checking of skiing equipment) | 0.46 (0.20 to 1.02) | 0.0561 |