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Table 2 Mean number of Anopheles arabiensis mosquitoes caught indoors and outdoors when different transfluthrin-treated eave ribbons were fitted to the experimental huts inside the semi-field chamber

From: Eave ribbons treated with the spatial repellent, transfluthrin, can effectively protect against indoor-biting and outdoor-biting malaria mosquitoes

Intervention N Indoor-biting risk (assessed using CDC-light traps) Outdoor-biting risk (assessed using human landing catches)
Mean [95% CI] % Protection P-value Mean [95% CI] % Protection P-value
Control 25 12.06 [7.85–16.27] Reference 105.20 [80.3–130.06] Reference
Untreated eave-ribbons 10 8.15 [4.25–12.05] 32.4% > 0.05 121.80 [82.42–161.18] − 15.7% > 0.05
Eave-ribbons 5%*** 10 0.10 [0.00–0.48] 99.2% < 0.001 0.00 [0.00–0.00] 100.0% < 0.001
Eave-ribbons 1.5%*** 10 0.01 [0.00–0.47] 99.9% < 0.001 0.15 [0.00–0.57] 99.9% < 0.001
Eave-ribbons 0.2%*** 10 0.00 [0.00–0.00] 100.0% < 0.001 0.00 [0.00–0.00] 100.0% < 0.001
Eave-ribbons 0.02%*** 10 2.75 [0.32–5.18] 77.2% < 0.001 46.10 [23.5–68.57] 56.2% < 0.001
  1. N refers to number of experimental nights (N values for the control are summed up across the experiments and baseline data omitted). The mean nightly mosquito catches are estimated using GLMMs at 95% confidence intervals (CI). The % Protection refers to percentage reduction in catches relative to controls
  2. ***Values refer to percentage of transfluthrin used to treat the eave ribbons