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Table 4 Household factors associated with An. gambiae counts in zero inflated negative binomial model, Nchelenge, 2012–2014. Univariate and multivariable models includes data from cross-sectional and first visit to longitudinal study households. Presented are results for the negative binomial positive counts (counts >0) as incidence rate ratios (IRR)

From: Spatio-temporal heterogeneity of malaria vectors in northern Zambia: implications for vector control

Negative binomial counts > 0 Univariate Multivariable
Variable IRR 95 % CI IRR 95 % CI
No. of persons sleeping in house 0.902 0.740 1.100
No. of ITNs per house 0.559* 0.349* 0.897*
IRS, ever 0.902 0.440 1.851 1.039 0.444 2.433
Closed eaves 0.217 0.016 2.956 0.102* 0.011* 0.904*
Metal roof 3.197 0.287 35.610
Fire burned previous night 0.810 0.252 2.608
Open well 2.229* 1.078* 4.608* 2.257* 1.068* 4.766*
Rainy season 1.420 0.714 2.824 1.000 0.360 2.776
Within 3 km of Lake Mweru 0.601 0.291 1.243 0.204* 0.072* 0.581*
Interaction: Season by inland/lakeside 0.634 0.145 2.766 3.932* 1.024a 15.096*
  1. *Outcomes indicated with an asterisk are statistically significant