Table 3.

Final logistic regression model for DD with animal and pen-level factors in two feedlots (N=2,854)

Risk factor	Odds ratio	SEM	95% CI1	P-value
Sex
Heifers	Ref2
Steers	0.96	0.38	0.44–2.08	0.92
Type3
Fall	Ref2
Winter	1.63	0.57	0.81–3.25	0.17
Pen condition4
1	Ref2
2	0.37	0.40	0.05–3.05	0.36
3	8.45	3.37	3.87–18.53	<0.001
4	13.9	6.33	5.67–33.82	<0.001
Pen of origin5	0.99	0.06	0.87–1.13	0.87
Baseline odds	0.005	0.002	0.02–0.1

¹95% Wald confidence interval.

²Reference group used for comparisons.

³Type of cattle: fall- or winter-placed calves.

⁴Pen condition: 1=dry, 2=more bedding than mud, 3=more mud than bedding and 4=excessive mud.

⁵Pen of origin as a variable with random effect.