Table 1 Risk factors of first malaria attack in Amerindian children [2]

Vegetation around the home: % cleared

< 50%

1

50--75%

0.62

0.43--0.88

0.008

> 75%

0.5

0.31--0.81

0.005

Distance from the home to the river

< 20 m

1

20--40 m

0.56

0.37--0.85

0.006

40--80 m

0.72

0.47--1.09

0.128

80--120 m

0.52

0.28--0.94

0.033

> 120 m

0.5

0.30--0.86

0.012

Home: number of occupants

≤ 6

1

7

1.54

0.98--2.44

0.061

8--11

1.9

1.29--2.81

0.001

> 11

2.03

1.27--3.23

0.003

Ethnicity

Emerillon

1

Wayampi

0.552

0.401--0.796

< 0.001

Clothing

Kalimbe

1

Modern

0.64

0.46--0.90

0.011