Table 3. Cross-correlations (r_s)^a between weekly dengue incidences in petrochemical gas explosion-affected districts and subsequent weekly dengue incidences in the other districts, Kaohsiung, Taiwan, 2002 and 2014.

Time status	2014		2002
	PGE-AD and PGE-ND	PGE-AD and Others	PGE-AD and PGE-ND	PGE-AD and Others
Concurrent	0.939***	0.711*	0.419	0.670*
Time after the PGE
1-week	0.956***	0.866***	0.272	0.499
2-week	0.916***	0.959***	0.201	0.286
3-week	0.822***	0.963***	0.102	0.207
4-week	0.672*	0.894***	−0.076	−0.111
5-week	0.513	0.757**	−0.274	−0.310
6-week	0.375	0.600	−0.406	−0.383
7-week	0.226	0.404	−0.446	−0.615

PGE: petrochemical gas explosion; PGE-AD: PGE-affected districts; PGE-ND: PGE-neighboring districts; Others: the other administrative districts.

^aSpearman’s rank correlation coefficients (r_s) with Bonferroni-adjusted P values were used to evaluate time cross-correlations; Only incidence data after the PGE was assessed (a total of 23 weeks after 31 July, *P < 0.05; **P < 0.005 and ***P < 0.001).