Table 3.

Multivariable linear regression models for different county strata and for regional analysis on the log₁₀ median number of animal rabies test reports from a county

Model	Type of county in model (No. of counties)	Adjusted model r2	Partial r2 expressed as a percentage (%) of the variance explaineda
			Log10 population	Log10 county expenditures	Log10 density	% college graduates	% below poverty level	State laboratory present
Includes county population	Counties not reporting rabies (61)	75	69		7			N/Ab
	Counties reporting rabies but not raccoon rabies (116)	73	73
	Counties reporting raccoon rabies (536)	71	69				2	<1
	Counties without state laboratories (682)	70	69			1		N/A
	All counties (713)	72	70			1	<1	<1
Includes county expenditures	Counties not reporting rabies (61)	45		40	7			N/A
	Counties reporting rabies but not raccoon rabies (116)	60		60
	Counties reporting raccoon rabies (536)	69		66		1	2	1
	Counties without state laboratories (682)	65		62	1	1	2	N/A
	All counties (713)	67		63	1	2	1	1

Model adjusted r² and partial r² for significant variables.

^aVariables significant at p ≤ 0.01.

^bNot applicable.