Table 1.
Cross correlation between monthly malaria incidence and climate factors in Hainan, China
| Lag | MT | MaxT | MinT | R | MH | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CCF | SE | CCF | SE | CCF | SE | CCF | SE | CCF | SE | |||||
| -6 | -0.53 | 0.08 | -0.47 | 0.08 | -0.38 | 0.08 | -0.54 | 0.08 | 0.02 | 0.08 | ||||
| -5 | -0.30 | 0.08 | -0.25 | 0.08 | -0.20 | 0.08 | -0.47 | 0.08 | -0.02 | 0.08 | ||||
| -4 | 0.04 | 0.08 | 0.04 | 0.08 | 0.09 | 0.08 | -0.31 | 0.08 | -0.03 | 0.08 | ||||
| -3 | 0.34 | 0.08 | 0.28 | 0.08 | 0.34 | 0.08 | -0.06 | 0.08 | -0.01 | 0.08 | ||||
| -2 | 0.57 | 0.08 | 0.45 | 0.08 | 0.52 | 0.08 | 0.19 | 0.08 | 0.03 | 0.08 | ||||
| -1 | 0.65 | 0.08 | 0.48 | 0.08 | 0.59 | 0.08 | 0.36 | 0.08 | 0.09 | 0.08 | ||||
| 0 | 0.55 | 0.08 | 0.37 | 0.08 | 0.49 | 0.08 | 0.42 | 0.08 | 0.08 | 0.08 | ||||
| 1 | 0.30 | 0.08 | 0.15 | 0.08 | 0.26 | 0.08 | 0.35 | 0.08 | 0.02 | 0.08 | ||||
| 2 | -0.03 | 0.08 | -0.12 | 0.08 | -0.01 | 0.08 | 0.16 | 0.08 | -0.04 | 0.08 | ||||
| 3 | -0.36 | 0.08 | -0.38 | 0.08 | -0.28 | 0.08 | -0.10 | 0.08 | -0.10 | 0.08 | ||||
| 4 | -0.60 | 0.08 | -0.55 | 0.08 | -0.46 | 0.08 | -0.38 | 0.08 | -0.16 | 0.08 | ||||
| 5 | -0.66 | 0.08 | -0.57 | 0.08 | -0.53 | 0.08 | -0.49 | 0.08 | -0.10 | 0.08 | ||||
| 6 | -0.56 | 0.08 | -0.46 | 0.08 | -0.45 | 0.08 | -0.56 | 0.08 | -0.13 | 0.08 | ||||
CCF: cross correlation coefficient. SE: standard error. Lag: the number of lagged months. The cross-correlation of each lagged month between the monthly malaria incidence and climate factors could be identified if the CCF was larger than two times the SE.