Table 2.

Multiple linear regression analysis results

Predictor variables	Estimated coefficient	Standard error	t statistic	P value
RPD	−36.97	14.54	−2.54	0.019*
PAD	0.15	0.10	1.42	0.170
LRR	−1.35	0.15	−9.09	< 0.001***
C	134.54	14. 68	9.13	< 0.001***

The best-fitting model was estimated using backward stepwise multiple regression analysis. The number of residents protected by drugs (RPD), presence of Anopheles dirus (PAD), and literacy rate of adult rural residents (LRR) were included in this regression model (log likelihood = −59.61, F-statistic = 36.06, P value < 0.001, Akaike information criterion (AIC) = 5.30). *P < 0.05. **P < 0.01. ***P < 0.001.