Table 4.

Significant factors associated with seropositivity to Brucella infection in multivariable logistic models (May 2003–January 2004).

Variable	Category	OR	95% CI OR	P-value
Place of farming
	Periurban + rural	1.00
	Urban	0.37	0.13–1.12	<.001
Age of animals
	≤6 years	1.00
	≥6 years	4.02	1.86–8.69	<.001
Herd close to stock route/h/ground
	≤1 km	1.00
	≥1 km	3.09	1.04–9.17	<.001
Access to surface water
	No	1.00
	Yes	2.66	1.90–7.87	<.001

OR: odds ratio for categorical/binary variables; CI OR: lower and upper limits for 95 percent confidence interval of the odd ratio.