Table 1.
Correlation and regression coefficients (negative binomial) between DF case and independent variables (bivariate Spearman rank correlations), Hanoi, 2002–2010
| Temperature | Rainfall | Case | Population | Humidity | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
||||||||||||
| Lag time | Spearman's rho (p) | Spline (oC) | Quasi Poisson's coefficient (p) | Spearman's rho (p) | Spline (mm) | Quasi Poisson's coefficient (p) | Spearman's rho (p) | Quasi Poisson's coefficient(p) | Spearman's rho (p) | Quasi Poisson's coefficient (p) | Spearman's rho (p) | Quasi Poisson's coefficient (p) |
| Lag 0 | 0.28 (0)* | ≤30 | 0.24 (0)* | 0.14 (0.16) | na | na | na | na | 0.63 (0)* | −0.35 (0)* | −.1209 (0.000)* | |
| >30 | −0.25 (0.004)* | na | na | na | 0.0007 (0)* | |||||||
| Lag 1 | 0.47 (0)* | ≤30 | 0.23 (0)* | 0.36 (0)* | ≤450 | 0.004 (0)* | 0.002 (0.000)* | na | na | |||
| >30 | −1.94 (0.008)* | >450 | −0.0008 (0.922) | 0.84 (0)* | na | −0.10 (0.30) | ||||||
| Lag 2 | 0.53 (0)* | ≤30 | 0.22 (0)* | 0.47 (0)* | ≤450 | 0.006 (0)* | −0.001 (0.287) | na | na | |||
| >30 | −0.52 (0.447) | >450 | −0.008 (0.21) | 0.57 (0)* | na | 0.077 (0.44) | ||||||
| Lag 3 | 0.44 (0)* | ≤30 | 0.15 (0)* | 0.38 (0)* | ≤450 | 0.006 (0)* | na | |||||
| >30 | 0.75 (0.362) | >450 | −0.11 (0.104) | 0.37 (0)* | 0.00009 (0.884) | na | na | 0.135 (0.17) | na | |||
| Lag 4 | 0.25 (0.01)* | na | na | na | na | na | 0.27 (0.01)* | na | na | na | na | |
| Lag 5 | 0.02 (0.81) | na | na | na | na | na | 0.21 (0.03)* | na | na | na | na | |
| Lag 6 | −0.21 (0.03) | na | na | na | na | na | 0.18 (0.07) | na | na | na | na | |
*
s p≤0.05.