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Table 5 Bivariate logistic regression results for presence of An. arabiensis larvae: landscape characteristics

From: Spatial and temporal distribution of the malaria mosquito Anopheles arabiensis in northern Sudan: influence of environmental factors and implications for vector control

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