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Table 2 Reductions in parasite prevalence and mosquito densities after IRS.

From: Community-wide benefits of targeted indoor residual spray for malaria control in the Western Kenya Highland

Location Survey period Intervention Nonintervention Adjusted reduction (%)
P. falciparum prevalence (%)
Valley Before intervention 63.61 [53.63, 73.61] 39.71 [32.24, 47.18]  
Valley After intervention 16.44 [7.81, 25.11] 29.62 [23.16, 36.09] 65.35
Uphill Before intervention 44.86 [34.87, 54.85] 25.04 [17.57, 32.51]  
Uphill After intervention 18.53 [9.88, 27.18] 19.28 [12.81, 25.74] 46.35
An. gambiae density (female/house/night)
Valley Before intervention 3.41 [1.04, 5.76] 2.06 [0, 5.14]  
Valley After intervention 0.17 [0, 2.28] 3.18 [0.42, 5.93] 96.82
Uphill Before intervention 0.94 [0, 3.31] 0.61 [0, 4.11]  
Uphill After intervention 0.47 [0, 2.58] 0.63 [0, 3.05] 51.6
An. funestus density (female/house/night)
Valley Before intervention 0.78 [0.25, 1.31] 0.23 [0.06, 0.39]  
Valley After intervention 0.06 [0, 0.54] 0.12 [0, 0.27] 85.26
Uphill Before intervention 0.26 [0, 0.79] 0.08 [0, 0.25]  
Uphill After intervention 0.05 [0, 0.53] 0.05 [0, 0.19] 69.23
  1. † Reduction in parasite prevalence and vector densities in the intervention valley and uphill area after intervention were adjusted assuming no change in the corresponding nonintervention valley or uphill area.