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Table 2 Ae. aegypti mortality rates after exposure to insecticides in 2016 and 2017 using WHO tubes standard bioassay guidelines. The chi-square is calculated, and the probability comparing 2016 and 2017 data and insecticides of the same family are shown

From: High frequencies of F1534C and V1016I kdr mutations and association with pyrethroid resistance in Aedes aegypti from Somgandé (Ouagadougou), Burkina Faso

  Mortality (%) with 95% CI
Carbamate χ2 (p) Organophosphate χ2 (p) Pyrethroid χ2 (p)
Propoxur Bendiocarb Fenitrothion Malathion Permethrin Deltamethrin
2016 54.74 [44.74–64.37] 91.92 [84.86–95.85] 9.43 (0.002) 97.44 [91.12–99.29] 100 [96.44–100] 0.03 (0.855) 20.19 [13.6–28.9] 36.99 [26.82–48.45] 4.9 (0.02)
2017 44.32 [34.39–54.72] 81.91 [72.93–88.39] 11.19 (0.0008) 100 [96.19–100] 97.87 [92.57–99.41] 0.02 (0.879) 15.28 [8.75–25.32] 25.84 [17.88–35.80] 2.7 (0.09)
χ2 (p) 1.09 (0.29) 0.57 (0.45)   0.03 (0.86) 0.02 (0.88)   0.7 (0.41) 1.98 (0.16)  
  1. Numbers in brackets indicate the 95% CI; χ2 was obtained by Pearson’s chi-squared test