Table 5

Bivariate logistic regression results for presence of An. arabiensis larvae: landscape characteristics

Dongola

Merowe

Habitats sampled

OR

95% CI

P value*

Habitats sampled

OR

95% CI

P value*

Observed land cover

<0.0001

<0.0001

Bare fields

123

1.00

184

1.00

Brickworks

51

1.92

0.84–4.38

0.122

38

1.71

0.58–5.02

0.33

Cultivated fields

117

0.71

0.32–1.56

0.399

41

0.58

0.13–2.63

0.48

Palm grove

373

0.30

0.15–0.60

0.001

718

0.84

0.46–1.54

0.58

Channel edge

188

3.62

2.00–6.53

<0.0001

182

5.54

3.01–10.22

<0.0001

Settlement

429

0.42

0.22–0.80

0.008

896

0.44

0.24–0.83

0.01

RS-derived land cover

<0.0001

<0.0001

Inland settlement

361

1.00

316

1.00

Tree-dominated mosaic

225

0.79

0.35–1.80

0.58

305

3.28

1.67–6.46

0.001

Field-dominated mosaic

220

1.00

0.46–2.17

0.99

598

1.67

0.86–3.25

0.13

Riverside settlement

248

4.46

2.52–7.88

<0.0001

609

0.99

0.49–2.03

0.99

Channel edge

227

8.32

4.79–14.45

<0.0001

234

8.35

4.36–15.97

<0.0001

Distance to river (m)

<0.0001

<0.0001

< 200

370

1.00

564

1.00

200–399

178

0.66

0.41–1.05

0.08

445

0.54

0.34–0.84

0.01

400–799

127

0.40

0.21–0.75

0.004

543

0.34

0.21–0.55

<0.0001

800+

606

0.19

0.12–0.29

<0.0001

515

0.83

0.56–1.22

0.34

* P values in bold are from likelihood ratio tests; P values for individual exposure categories are from Wald tests.

Ageep et al. Malaria Journal 2009 8:123   doi:10.1186/1475-2875-8-123