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Table 6 Multivariable conditional logistic regression model 2 of risk factors for impaction colic in donkeys housed at the Donkey Sanctuary between 1st January 2003 and 31st March 2005.

From: Epidemiology of impaction colic in donkeys in the UK

Variable   Odds Ratio Lower 95% CI Upper 95% CI LRS P-value
Continuous      
Age (years)   1.09 1.00 1.182 0.03
Categorical      
Dental disease No 1.00    
  Yes 29.73 3.95 223.67 <0.001
  1. Model 2 included the variables age, dental disease' farm and extra rations during the backwards stepwise regression. LRS = likelihood ratio test statistic