Table 2.

Results of the stationarity ADF test and KPSS test of time series of dengue data and external factors.

Dengue Data	ADF	KPSS
Weekly dengue cases	−6.28 *	0.399 **
Natural log-transformed weekly dengue cases	−5919 *	0.789 **
Time-differencing natural log-transformed weekly dengue cases	−5.67 *	0.068 *
NDVImean	−7.875 *	0.061 *
RHmean	−7.662 *	0.293 *
Rsum	−8.387 *	0.052 *
Tmean	−7.497 *	1.008 **
1% level	−3.4401	0.739
5% level	−2.8658	0.463
10% level	−2.569	0.347

* Stationary ** Non-stationary.