Table 2.

Logistic regression analysis

Variable	B	SEa	Wald	df	Significance	eB
Yr	0.229	0.049	21.457	1	0.000	1.257
Latitude	0.096	0.160	0.358	1	0.550	1.100
Host			17.914	3	0.000
Host (bovine)	−0.322	0.800	0.162	1	0.688	0.725
Host (caprine)	−3.060	1.021	8.989	1	0.003	0.047
Host (ovine)	−1.157	0.938	1.520	1	0.218	0.314
Constant	−462.083	98.314	22.091	1	0.000	0.000

^aStandard error of coefficient B.