Figure 5

Distribution of coefficients of fourteen candidate variables in 1000 stepwise bootstrap models. Frequency histograms of coefficients obtained in automated backward stepwise exclusion regression analysis against 1000 bootstrap samples of the malaria prevalence data in Stage 3. In each case the vertical black line indicates coefficient = 0. (A) annual maximum rainfall (mm); (B) winter (April – October) total rainfall (mm); (C) rainfall concentration (%); (D) winter (April – October) mean temperature (°C); (E) annual maximum temperature (°C); (F) temperature proportional standard deviation (°C); (G) elevation (m); (H) annual maximum NDVI; (I) NDVI standard deviation; (J) summer (December–March) mean vapour pressure (hPa); (K) vapour pressure standard deviation (hPa); (L) log distance to permanent water (m); (M) land cover: dry/low risk, moist/high risk areas; (N) start month of survey: main season (April–May).