Parameters | Wavelet analysis (MATLAB) | SPSS | |
---|---|---|---|
Sign of correlation and (lagging period in weeks) | Cross-correlation coefficient | Spearman’s rho | |
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 |