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Table 1 Occupancy of different mosquito habitat categories and types by all stages of Anopheles and Culicine larvae.

From: Achieving high coverage of larval-stage mosquito surveillance: challenges for a community-based mosquito control programme in urban Dar es Salaam, Tanzania

Variables Anopheles larvae occupancy Culicine larvae occupancy
  Proportion occupied %
(n/N) a
OR [95%CI] P Proportion occupied % (n/N) a OR [95%CI] P
Natural Habitats 28.64 (63/220) 1.00 b NA b 20.00 (44/220) 1.00 b NA b
Marsh/swampy areas 36.25 (58/160) 1.00c NAc 11.88 (19/160) 1.00c NAc
Riverbeds 8.33 (2/24) 0.38 [0.09,1.64] 0.192 95.83 (23/24) 137.54 [18.17, 1041.38] < 0.001
Seepages/springs 8.33 (3/36) 0.38 [0.11,1.26] 0.113 5.56 (2/36) 0.35 [0.08,1.51] 0.160
Agricultural artificial habitats 43.42 (33/76) 1.91 [1.12,3.28] 0.019 22.37 (17/76) 1.15 [0.61, 2.17] 0.660
Rice paddies 71.48 (5/7) 10.33 [1.96,54.39] 0.006 14.28 (1/7) 0.99 [0.12, 8.46] 0.998
Matuta 47.06 (16/34) 3.67 [1.78,7.57] < 0.001 29.41 (10/34) 2.49 [1.12, 5.52] 0.025
Other agriculture 34.39 (12/35) 2.16 [1.02,4.55] 0.044 17.14 (6/35) 1.24 [0.49, 3.13] 0.653
Non-agricultural artificial habitats 5.06(135/2669) 0.13 [0.09, 0.19] < 0.001 28.81(769/2669) 1.60 [1.14,2.26] 0.007
Tyre tracks/puddles 19.48 (68/349) 2.35 [1.55,3.57] < 0.001 14.33 (50/349) 0.81 [0.46,1.42] 0.454
Drain 1.96 (21/1070) 0.84 [0.05,0.14] < 0.001 20.84(223/1070) 1.60 [1.15, 2.24] 0.006
Construction sites 6.25 (42/672) 0.27 [0.18,0.41] < 0.001 31.55 (212/672) 2.70 [1.92,3.80] < 0.001
Water storage containers 0.34 (2/587) 0.01 [0.003,0.058] < 0.001 47.36 (278/587) 5.34 [3.80, 7.51] < 0.001
Ponds 18.18 (2/11) 0.92 [0.19,4.35] 0.914 54.55 (6/11) 7.18 [2.11, 24.40] 0.002
Total 7.79(231/2965) NA NA 27.99(830/2965) NA NA
  1. The proportion of wet habitats found by investigator to contain Anopheles and Culicine larvae; Odds ratio (OR) and P values for the likelihood of occupancy determined with a binary logistic regression treating habitat category or type as potential determinants.
  2. a N is the total number of all wet habitats found during cross-sectional surveys while n is the number of either Anopheles or Culicine larvae positive habitats found
  3. b is the reference group for comparing habitat categories,
  4. c is the reference group for comparing the habitat types,
  5. CI = confidence interval
  6. NA; Not applicable