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Table 3 Mixed-effects negative binomial regression analysis of number of P. falciparum oocysts

From: Exposure to deltamethrin affects development of Plasmodium falciparum inside wild pyrethroid resistant Anopheles gambiae s.s. mosquitoes in Uganda

   Incidence-rate ratio Std. Err. Z p [95 % Confidence Interval]
Dose category Control 1.000
Low dose 0.586 0.075 −4.18 <0.001 0.456 0.753
High dose 0.655 0.068 −4.08 <0.001 0.535 0.803
Average temperature (°C)   0.522 0.086 −3.93 <0.001 0.378 0.722
Prior intake of antimalarials Not taken 1.000
Taken 0.595 0.156 −1.98 0.048 0.356 0.995
Ln(alphaa) −0.688 0.088 −7.85 <0.001 −0.861 −0.516
Variance of random intercept 0.243 0.0899    0.118 0.502
  1. The dependent variable is number of oocysts
  2. Model χ 2 4d f = 47.72 p < 0.001 n = 421 number of groups (gametocyte donors) = 40
  3. aAlpha = Overdispersion parameter