Table 2 Correlation between environmental variables and monthly malaria incidence at the lowland, midland and highland dams in Ethiopia
Environmental variable | Pearson’s correlation with mean monthly malaria incidence | ||
|---|---|---|---|
Lowland dam | Midland dam | Highland dam | |
NDVI | 0.341 | 0.255 | 0.127 |
NDVI lagged by 1Â month | 0.567* | 0.303 | 0.239 |
NDVI lagged by 2Â months | 0.669* | 0.452* | 0.302 |
Village distance from reservoir shoreline | − 0.252 | − 0.132 | − 0.103 |
Village distance from reservoir shoreline lagged by 1 month | − 0.598* | − 0.455* | − 0.487* |
Village distance from reservoir shoreline lagged by 2 months | − 0.441* | − 0.368* | − 0.377* |
Monthly average reservoir water level | 0.231 | 0.312 | 0.121 |
Monthly average reservoir water level lagged by 1Â month | 0.296 | 0.324 | 0.209 |
Monthly average reservoir water level lagged by 2Â months | 0.362* | 0.408* | 0.299 |
Monthly change in reservoir water level | − 0.124 | − 0.235 | − 0.191 |
Monthly change in reservoir water level lagged by 1 month | − 0.616* | − 0.481* | − 0.694* |
Monthly change in reservoir water level lagged by 2 months | − 0.244 | − 0.366* | − 0.301 |