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Table 1 Generalized linear model testing the effects of sampling year (1993–2012), insecticide (DDT, permethrin, deltamethrin, bendiocarb & propoxur, fenitrothion & malathion), ecological zone (zones 1 and 2) and their interactions on bioassay mortality

From: Long-term trends in Anopheles gambiae insecticide resistance in Côte d’Ivoire

Model term Wald χ2 d.f. P-value
Intercept 157.498 1 0.000
Year (covariate) 154.101 1 0.000
Insecticide 90.866 4 0.000
Ecological zone 30.381 1 0.000
Insecticide × year 92.643 4 0.000
Ecological zone × insecticide 31.005 1 0.000
Insecticide × ecological zone 223.041 4 0.000
  1. A three-way interaction term could not be fitted to model owing to insufficient variance in one of the combinations.