Table 5 Multivariate logistic regression analysis of factors associated with infection and exposure to Plasmodium falciparum

Age group in years

 ≤5

1

–

–

1

–

–

1

–

–

 5.1–10

1.81

1.17–2.81

0.009

1.73

1.22–2.45

0.003

1.57

1.17–2.11

0.003

 10.1–15

1.45

0.83–2.51

0.182

1.48

0.99–2.19

0.052

2.95

2.24–3.89

<0.001

 15.1–20

0.86

0.37–2.02

0.726

1.28

0.68–2.42

0.438

5.11

3.85–6.79

<0.001

 >20

0.27

0.12–0.62

0.003

0.77

0.52–1.13

0.180

8.18

6.51–10.27

<0.001

Anaemic (<11 g/dl)

2.91

1.88–4.53

<0.001

1.26

1.02–1.56

0.034

Elevation (m)

 1430–1494

1.0

–

–

 1495–1510

1.0

0.72–1.38

0.995

 1511–1529

0.94

0.65–1.35

0.724

 1530–1685

0.63

0.46–0.86

0.005

Socio-economic status (SES) score

 1 (low)

1

–

–

1

–

–

1

–

–

 2

0.53

0.20–1.46

0.217

0.57

0.35–0.94

0.030

1.07

0.77–1.50

0.674

 3

0.57

0.23–1.42

0.223

0.78

0.44–1.38

0.385

0.80

0.62–1.03

0.081

 4

0.30

0.10–0.93

0.038

0.58

0.33–1.02

0.059

0.83

0.59–1.17

0.290

 5 (high)

0.64

0.26–1.59

0.326

0.74

0.44–1.22

0.232

0.69

0.52–0.92

0.013

Open eaves

5.05

1.60–16.0

0.007

Mosquito control

 None

1

–

–

1

–

–

 Net only

1.40

0.49–4.01

0.516

1.54

0.98–2.43

0.060

 IRS only

2.61

1.01–6.78

0.048

2.13

1.21–3.75

0.010

 Both

1.49

0.52–4.29

0.446

1.67

1.00–2.79

0.051