Table 5 Multivariable conditional logistic regression model 1b of risk factors for impaction colic in donkeys housed at the Donkey Sanctuary between 1st January 2003 and 31st March 2005.
| Variable | Odds Ratio | Lower 95% CI | Upper 95% CI | LRS P-value | |
|---|---|---|---|---|---|
| Continuous | |||||
| Age (years) | 1.09 | 1.05 | 1.12 | <0.001 | |
| Categorical | |||||
| Extra rations | No | 1.00 | |||
| Yes | 2.48 | 1.49 | 4.12 | <0.001 | |
| Musculo skeletal exam | No | 1.00 | |||
| Yes | 2.60 | 1.36 | 4.99 | 0.004 | |
| Previous colic | No | 1.00 | |||
| Yes | 8.81 | 2.66 | 29.2 | <0.001 | |
| Farm | 1 | 1.00 | |||
| 2 | 0.37 | 0.21 | 0.64 | <0.001 |