. 2018 Aug 21;15(9):1792. doi: 10.3390/ijerph15091792

Table 3.

The comparison of model fitting for the Poisson and negative binomial (NB) models.

Variable	Model Parameter	Poisson with RE		NB with RE
Variable	Model Parameter	Estimate	SE	Estimate	SE
	${\hat{β}}_{0}$	31.814 ***	6.926	40.983 ***	9.853
Building Year	${\hat{β}}_{1}$	−0.018 ***	0.004	−0.022 ***	0.005
Town Taxable Value	${\hat{β}}_{2}$	−0.565 *	0.226	−1.051 ***	0.294
Soil Lead	${\hat{β}}_{3}$	0.317 **	0.092	0.404 **	0.134
	${\hat{σ}}^{2}$	0.861 ***	0.119	0.698 ***	0.119
	κ			1.142 ***	0.145

Note: RE stands for the random effects; SE stands for the standard error of model coefficient; The symbols *, **, and *** indicate statistical significance at α = 0.05, 0.01, and 0.001 levels, respectively.