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


Model 1b excluded the variables dental disease and weight during the backwards stepwise regression. LRS = likelihood ratio test statistic

Cox et al. BMC Veterinary Research 2007 3:1   doi:10.1186/1746-6148-3-1

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