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Table 4 Entomological outcomes for each of the study arms, aggregated over the 2-year trial period

From: The effect of community-driven larval source management and house improvement on malaria transmission when added to the standard malaria control strategies in Malawi: a cluster-randomized controlled trial

Outcomesa Control HI LSM HI + LSM
Mean value observed (95% CI) Mean value observed (95% CI) Estimated rate ratiob (95% CI) Mean value observed (95% CI) Estimated rate ratiob (95% CI) Mean value observed (95% CI) Estimated rate ratiob (95% CI)
EIR (indoors + outdoors) 0.001 (0.000, 0.008) 0.000 (0.000, 0.004) NA 0.009 (0.005, 0.015) NA 0.011 (0.005, 0.021) NA
All Anopheles females indoors 0.061 (0.035, 0.087) 0.015 (0.005, 0.026) 1.11 (0.16, 8.17) 0.084 (0.064, 0.104) 2.18 (0.51, 10.9) 0.093 (0.062, 0.124) 2.56 (0.45, 16.8)
A. arabiensis females indoors 0.020 (0.005, 0.035) 0.011 (0.002, 0.021) 2.83 (0.42, 21.8) 0.041 (0.027, 0.055) 11.13 (2.36, 60.3) 0.040 (0.020, 0.060) 7.77 (1.68, 39.7)
A. funestus females indoors 0.029 (0.011, 0.047) 0.004 (0.000, 0.009) 2.29 (0.21, 23.1) 0.035 (0.022, 0.048) 0.41 (0.04, 2.56) 0.048 (0.026, 0.070) 1.26 (0.23, 6.05)
All Anopheles females outdoors 0.058 (0.033, 0.083) 0.017 (0.006, 0.028) 0.51 (0.09, 2.80) 0.136 (0.111, 0.162) 1.95 (0.49, 8.41) 0.051 (0.028, 0.074) 0.36 (0.06, 2.08)
A. arabiensis females outdoors 0.043 (0.021, 0.065) 0.015 (0.005, 0.026) 0.95 (0.22, 3.97) 0.068 (0.049, 0.086) 0.91 (0.30, 2.94) 0.024 (0.008, 0.040) 0.14 (0.02, 0.74)
A. funestus females outdoors 0.009 (0.000, 0.019) 0.002 (0.000, 0.006) 0.38 (0.01, 8.67) 0.058 (0.041, 0.074) 3.49 (0.55, 28.8) 0.024 (0.008, 0.040) 2.12 (0.26, 22.2)
  1. EIR entomological inoculation rate, HI house improvement, LSM larval source management, NA not applicable because EIR analysis at household level not done due to low values
  2. aEIR and Anopheles mosquito densities are based on nightly rates
  3. bEffect size estimates are presented as relative rate ratios based on household-level generalized linear models with the control arm as the reference category