Table 4. The association between GDP and JE incidence in different regions from 1997 to 2008. Coefficients of GDP in the Zero-inflation Poisson Regression Model (preliminary analysis).

Region	Poisson	Zero-inflated
All	0.0005**	0.0059**
Eastern	–0.0003**	0.0008
Middle	0.0003	0.0030**
Western	0.0004	0.0023

All: the whole study area; Eastern: Eastern Chongqing; Middle: Middle Chongqing; Western: Western Chongqing. *p≤0.1, **p≤0.05.