Table 4.

Partial results from the OLS regression model

Model—With Mean County Altitude and Potential Covariates—R-Squared = 0.483, AIC Value: 14,432.13
	Coefficient	S.E	t-Value	p-Value
Intercept	2.730	0.336	8.134	0.000 a
Mean county altitude	0.004	0.000	40.691	0.000 a
% Smokers	0.334	0.013	25.196	0.000 a
% aged 65 and over	0.219	0.012	18.828	0.000 a
% African American	−0.036	0.004	−10.093	0.000 a
Association rate	−0.0045	0.007	−6.028	0.000 a

^a Significant at p < 0.001.