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Final model based on multivariate logistic regression of possible risk factors of SE for for 275 Icelandic horses.
| Risk factors | OR | CI (95%) | p value |
| Years from export* | 1,097 | 1,016 – 1,183 | 0,017 |
| Moisture at pasture | 1,860 | 1,023 – 3,366 | 0,040 |
| Lee at pasture | 2,278 | 1,155 – 4,491 | 0,017 |
* Odds-Ratio (OR) and 95% confidence intervals (CI) for each year
