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Table 4 Random effects Poisson regression results

From: Retrospective evaluation of the effectiveness of indoor residual spray with pirimiphos‐methyl (Actellic) on malaria transmission in Zambia

Parameter Incidence rate ratio (IRR) 95% Confidence Interval P-value
Province
Eastern (ref.)    
Luapula 1.72 1.49–1.98 < 0.001
Muchinga 1.27 1.11–1.45 0.001
Northern 1.04 0.89–1.23 0.621
IRS
None (ref.)    
IRS 0.91 0.84–0.98 0.019
IRS w/ mSpray 0.75 0.66–0.86 < 0.001
Rainfall 1.00 1.00–1.00 0.017
EVI 1.50 0.88–2.56 0.136
Year
2014 (ref.)    
2015 1.12 1.04–1.21 0.004
2016 1.16 1.06–1.24 0.001
2017 1.11 1.00–1.19 0.050
Total tested 1.00 0.99–1.00 0.260
Total confirmed previous year 0.99 0.99–1.00 0.551