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Table 2 Occupancy of different mosquito habitat categories and types by Anopheles larvae.

From: Community-based surveillance of malaria vector larval habitats: a baseline study in urban Dar es Salaam, Tanzania

Habitat Category Habitat Type Anopheles occupancy*
   Present Absent Total Proportion occupied (%) OR P
Natural Habitats
  Freshwater Swamp 2 23 25 8.0 1.00** NA**
  Mangrove Swamp 1 2 3 33.3 NE NE
  Marsh 19 31 50 38.0 7.05 [1.49–33.3] 0.014
  River bed 2 0 2 100.0 NE NE
  Seepage 29 32 61 47.5 10.4 [2.3–48.1] 0.003
  Subtotal: 53 88 141 37.6 1.00** NA**
Agricultural artificial habitats
  Ridge and furrow 35 32 67 52.2 12.6 [2.7–57.6] 0.001
  Rice paddy 14 21 35 40.0 7.67 [1.56–37.8] 0.012
  Other agriculture 18 52 70 25.7 3.98 [0.85–18.6] 0.079
  Subtotal: 67 105 172 39.0 1.06 [0.67–1.67] 0.805
Non-Agricultural artificial habitats
  Construction 19 61 81 23.8 3.58 [0.77–16.6] 0.103
  Drain 57 166 223 25.6 3.95 [0.90–17.3] 0.068
  Puddle 36 39 75 48.0 10.6 [2.34–48.3] 0.002
  Tyre track 16 30 46 34.8 6.13 [1.28–29.4] 0.023
  Water storage container 1 15 16 6.3 0.77 [0.06–9.22] 0.834
  Subtotal: 129 311 441 29.3 0.69 [0.46–1.03] 0.066
Uncategorized
  Other 40 191 232 17.3 2.41 [0.55–10.6] 0.246
  Subtotal 40 191 232 17.3 0.348 [0.215–0.563] <0.001
Total   289 695 986 29.4 NA NA
  1. * The proportion of all habitats found to contain Anopheles larvae. Odds ratios (OR) and P values for the likelihood of occupancy were determined by logistic regression, treating habitat category or type as a determinant of detection.
  2. ** Reference group
  3. NE Not estimated: excluded from logistic regression analysis because of insufficient observations.
  4. NA Not Applicable