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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