Table 1 Summary of wavelet analysis, cross-correlation coefficient analysis, and Spearman’s rho results

Dengue incidence vs. rainfall (in mm)

Positive (7 weeks)

−0.143 in 18 weeks (0.069 in 7 weeks, but below upper confidence level)

−0.095; correlation is significant at the 0.05 level (two-tailed)

Dengue incidence vs. rainy days (days with rainfall >0.1 mm)*

No wavelet coherence

0.146 in 7 weeks

−0.058

Dengue incidence vs. rainy days (days with rainfall >0.3 mm)*

Positive (7 weeks)

0.144 in 7 weeks

−0.70

Dengue incidence vs. wet days (days with rainfall >1 mm)*

Positive (7 weeks)

0.137 in 7 weeks

−0.61

Dengue incidence vs. wet days (rainfall >3 mm)*

Positive (7 weeks)

0.136 in 7 weeks

−0.074

Dengue incidence vs. days with rainfall >20 mm

Positive (7 weeks)

−0.133 in 18 weeks (0.049 in 5 weeks, but below upper confidence level)

−0.116; correlation is significant at the 0.01 level (two-tailed)

Dengue incidence vs. maximum temperature

Positive (12 weeks)

0.202 in 14-week lag; 0.139 in 12-week lag

−0.143; correlation is significant at the 0.01 level (two-tailed)

Dengue incidence vs. minimum temperature

Positive (6 weeks)

0.166 in 7 weeks

−0.035

Dengue incidence vs. average temperature

Positive (11 weeks)

0.214 in 14 weeks

−0.169; correlation is significant at the 0.01 level (two-tailed)

Dengue incidence vs. daytime humidity

Positive (5 weeks)

0.158 in 7 weeks

−0.038

Dengue incidence vs. nighttime humidity

Positive (7 weeks)

0.137 in 7 weeks

−0.135; correlation is significant at the 0.01 level (two-tailed)

Dengue incidence vs. average humidity

Positive (5 weeks)

0.161 in 7 weeks (0.131 in 5 weeks)

−0.066

Dengue incidence vs. wind run

Negative (9 weeks)

0.181 in 20 weeks

0.150; correlation is significant at the 0.01 level (two-tailed)

-0.042 in 7 weeks

Dengue incidence vs. sunshine hours

Positive (15 weeks)

0.130 in 18 weeks (0.113 in 15 weeks; 0.125 in 6 weeks)

0.014