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Table 3 Negative binomial regression analysis assessing the association between risk factors and the number of RDT-positive individuals found among reactive case detection participants

From: The use of spatial and genetic tools to assess Plasmodium falciparum transmission in Lusaka, Zambia between 2011 and 2015

VariableFactorUnadjusted IRR (95% CI)P-valueAdjusted IRR (95% CI)P-value
Season and distance from uninhabited areasDry season > 250 mReferenceReferenceReferenceReference
Dry season and ≤ 250 m1.77 (0.79–3.94)0.1191.82 (0.81–4.10)0.147
Wet season and > 250 m1.95 (0.84–4.54)0.1642.06 (0.88–4.81)0.096
Wet season and ≤ 250 m2.06 (0.97–4.39)0.0612.14 (0.99–4.59)0.051
Age of index case< 5 yearsReferenceReferenceReferenceReference
5–15 years1.20 (0.76–1.88)0.4321.20 (0.76–1.89)0.441
> 15 years1.36 (0.88–2.11)0.1641.37 (0.88–2.12)0.163
Sex of index caseFemaleReferenceReferenceReferenceReference
Male1.22 (0.85–1.76)0.2871.20 (0.83–1.74)0.342
Index case travelled in the past monthNoneReferenceReferenceReferenceReference
Outside Lusaka0.81 (0.48–1.37)0.4370.76 (0.44–1.29)0.302
  1. N = 428 case investigations