Table 2 Effects of proximity to a dam and altitude on Plasmodium falciparium malaria southwest Ethiopia, September 2003 to August 2011

Buffer zones relative to GGHD

< 1 km

1

1-2 km

3.82

0.07

< 0.001

3.68

3.96

2-3 km

5.10

0.12

< 0.001

4.88

5.34

3-4 km

3.73

0.10

< 0.001

3.53

3.93

4-5 km

2.97

0.13

< 0.001

2.72

3.24

>5 km

1.04

0.15

0.81

0.78

1.37

Altitude in meters

≤ 1700

1

1701-1800

0.03

0.01

< 0.001

0.02

0.04

1801-1900

0.93

0.17

0.71

0.65

1.33

1901-2000

1.61

0. 30

0.01

1.12

2.31

2001-2100

2.51

0.47

< 0.001

1.74

3.63

2101-2230

2.64

0. 50

< 0.001

1.82

3.82

Age (year)

< 5

1

5-9

1.05

0.04

0.19

0.98

1.12

10-14

1.10

0.04

< 0.01

1.03

1.17

15 +

1.04

0.03

0.14

0.99

1.10

Sex

Male

1

Female

0.96

0.01

0.01

0.93

0.99