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Table 6 Fixed effects of univariate and multivariate multilevel negative binomial models of the entomological inoculation rate (EIR). Data analysis is based on census in December 2016–January 2017 and entomological data incorporated from the 5 surveys starting March 2016 (12 month period)

From: Higher risk of malaria transmission outdoors than indoors by Nyssorhynchus darlingi in riverine communities in the Peruvian Amazon

 UnivariateMultivariate
IRR95% CIP-valueIRR95% CIP-value
Null model     <0.001
 Constant0.080.02–0.33<0.0010.0030.0001–0.06 
Study area (ref = Salvador)
 Libertad26.501.46–479.40.027**26.611.47–480.60.026**
 Urco Miraño12.620.66–240.80.092*12.490.65–238.10.093*
 Visto Bueno56.323.18–997.10.006**56.463.19–997.80.006**
Location (ref = intradomestic)
 Peridomestic2.421.23–4.760.010**2.461.23–4.890.010**
No. of inhabitants per household0.910.72–1.160.455   
Inhabitants/room ratio0.890.67–1.170.398   
Recent settlement in community (ref = no)
 Yes0.260.04–1.810.172*   
No. of bednets0.950.64–1.390.785   
Years since last bednet impregnation (ref = never)
 One year0.320.10–1.100.07*   
 Two years0.450.12–1.680.233   
Electricity (ref = no)
 Yes4.661.93–11.240.001**   
  1. Mixed-effects negative binomial models, with random intercepts, Wald Test P-value, *P < 0.2, **P < 0.05
  2. Abbreviations: IRR, incidence rate ratio; CI, confidence interval