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Table 1 Mean mosquito densities in each year, region, island and mainland

From: Impacts of insecticide treated bed nets on Anopheles gambiae s.l. populations in Mbita district and Suba district, Western Kenya

Factors An. gambiae s.l. An. gambiae s.s. An. arabiensis
  Mean (SD) Mean (SD) % Mean (SD) %
11 villages      
 Year      
  1999 28.5 (42.79) 25.8 (41.61) 90.6 2.7 (4.42) 9.4
  2008 2.0 (4.04) 1.3 (3.35) 60.7 0.8 (1.72) 39.3
  2010 2.0 (3.49) 1.5 (2.84) 72.4 0.5 (1.42) 27.6
 Region      
  Western 6.1 (21.04) 5.2 (20.27) 86.6 0.8 (2.69) 13.4
  Eastern 7.1 (20.69) 6.0 (19.71) 85.2 1.1 (2.26) 14.8
 Island/mainland      
  Island 5.0 (13.07) 4.0 (11.32) 80.5 1.0 (2.74) 19.5
  Mainland 9.3 (29) 8.3 (28.54) 89.9 0.9 (1.91) 10.1
 Total 6.7 (20.84) 5.7 (19.95) 85.7 1.0 (2.45) 14.3
19 villages      
 Year      
  2008 2.4 (4.99) 0.8 (2.65) 32.4 1.6 (3.88) 67.6
  2010 2.6 (7.52) 1.3 (2.75) 54.1 1.4 (6.92) 45.9
 Region      
  Western 1.9 (3.71) 1.5 (3.36) 77.8 0.4 (1.2) 22.2
  Central 3.5 (5.74) 1.7 (3.1) 44.3 1.8 (4.35) 55.7
  Eastern 2.4 (7.88) 0.6 (1.94) 27.2 1.8 (7.54) 72.8
 Island/mainland      
  Island 2.2 (3.76) 1.6 (2.93) 72.1 0.6 (1.59) 27.9
  Mainland 2.7 (7.76) 0.8 (2.53) 29.7 1.9 (7.21) 70.3
 Total 2.5 (6.56) 1.1 (2.71) 43.9 1.5 (5.82) 56.1
31 villages (2010)      
 Region      
  Western 1.5 (2.98) 1.1 (2.47) 75.1 0.4 (1.27) 24.9
  Central 3.2 (8.98) 1.5 (2.97) 53.9 1.7 (8.42) 46.1
  Eastern 1.3 (2.41) 0.2 (0.45) 12.4 1.1 (2.23) 87.6
 Island/mainland      
  Island 2.2 (3.61) 1.7 (2.91) 74.5 0.5 (1.45) 25.5
  Mainland 2.3 (7.58) 0.7 (2.12) 34.8 1.6 (7.2) 65.2
 Total 2.2 (6.61) 1 (2.43) 47.9 1.3 (6.06) 52.1