Environmental and meteorological factors linked to malaria transmission around large dams at three ecological settings in Ethiopia

Table 4 Optimum stepwise multiple regression models relating monthly malaria incidence with environmental and climatic factors at the three dam sites

Model	Predictors	Non-standardized coefficient^a	Adjusted R²	Sig.
Lowland dam
1	Village distance from reservoir shoreline (lagged by 1 month)	− 9.46	0.468	< 0.001
2	Village distance from reservoir shoreline (lagged by 1 month), monthly change in reservoir water level (lagged by 1 month)	4..61	0.657	< 0.001
3	Village distance from reservoir shoreline (lagged by a month), monthly change in reservoir water level (lagged by 1 month), monthly total precipitation (lagged by 2 months)	2.49	0.813	< 0.001
Midland dam
1	Village distance from reservoir shoreline (lagged by 1 month)	− 5.47	0.398	< 0.001
2	Village distance from reservoir shoreline (lagged by 1 month), monthly reservoir water level (lagged by 2 month)	3.89	0.532	< 0.001
3	Village distance from reservoir shoreline (lagged by 1 month), monthly reservoir water level (lagged by 2 months), monthly total precipitation (lagged by 2 month)	0.66	0.711	< 0.001
Highland dam
1	Village distance from reservoir shoreline (lagged by 1 month)	− 1.98	0.324	< 0.001
2	Village distance from reservoir shoreline (lagged by 1 month), monthly change in reservoir water level	2.04	0.698	< 0.001
3	Village distance from reservoir shoreline (lagged by 1 month), monthly change in reservoir water level (lagged by 2 months), monthly minimum temperature precipitation (lagged by 1 month)	2.75	0.765	< 0.001

^aThe non-standardized coefficient of a variable is also referred as ‘effect size’ which indicates the result of a single unit increase in this variable on malaria incidence

ISSN: 1475-2875