Factors associated with Anaplasma spp. seroprevalence among dogs in the United States

Table 2 Estimates, standard errors, and odds ratios for the parameters corresponding to the factors found to be significantly associated with prevalence of canine exposure to Anaplasma spp. See Table 1 for the factor units

	Regression Coefficient Estimate	Standard Error	Exp(estimate)^a (Odds Ratio)	95 % CI^b
Endemic Regions model
Intercept	1.2930	0.5858	3.6437	(1.1542, 11.5041)
Temperature	−0.0740	0.0067	0.9287	(0.9165, 0.9410)
Median household income	0.0192	0.0021	1.0194	(1.0152, 1.1024)
Population density	−0.0110	0.0050	0.9891	(0.9792, 0.9979)
Precipitation	0.0463	0.0200	1.047	(1.010, 1.0925)
Relative humidity	−0.0291	0.0057	0.9713	(0.9605, 0.9821)
Forest coverage	0.0780	0.0124	1.0811	(1.055, 1.1078)
Deer/Vehicle collision	−0.8158	0.0889	0.4423	(0.3715, 0.5266)
Contiguous US model
Intercept	−0.1728	0.5849	0.8413	(0.2671, 2.6501)
Temperature	−0.0659	0.0056	0.9362	(0.9260, 0.9466)
Median household income	0.0197	0.0018	1.0200	(1.0163, 1.0236)
Population density	−0.0130	0.0043	0.9871	(0.9998, 1.0000)
Precipitation	0.0432	0.0165	1.0441	(1.0108, 1.0785)
Relative humidity	−0.0282	0.0050	0.9722	(0.9629, 0.9816)
Forest coverage	0.0708	0.0104	1.0734	(1.0517, 1.0954)
Deer/Vehicle collision	−0.8483	0.0780	0.4281	(0.3660, 0.5008)
Elevation	−0.0522	0.0240	0.9491	(0.9055, 0.9950)
Endemic/Non-endemic	1.2196	0.1473	3.3858	(2.5363, 4.5195)

^aThe Exp (estimate) column shows the estimated odds ratios
^bThe CI column gives a 95% confidence interval for the odds ratios. Intervals not containing unity imply that the factor is significant at the 0.05 level