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Table 4 Indoor human biting rates based on light trap catches and a conversion factor and incidence rate ratios in intervention and control groups of Anopheles arabiensis in the Adami Tullu, Ethiopia

From: Impact of combining indoor residual spraying and long-lasting insecticidal nets on Anopheles arabiensis in Ethiopia: results from a cluster randomized controlled trial

Mosquito collection method and study arms Collection nights Mean density (95% CI) IRR (95% CI) p-value
a) Control is the reference group
 Control 592 3.15 (2.62–3.79)   
 IRS 592 0.09 (0.05–0.15) 0.028 (0.015–0.051) < 0.001
 LLIN 592 0.26 (0.19–0.37) 0.084 (0.056–0.125) < 0.001
 IRS + LLIN 592 0.10 (0.06–0.17) 0.032 (0.018–0.056) < 0.001
b) IRS + LLIN is the reference group
 IRS + LLIN 444 0.10 (0.06–0.17)   
 IRS 444 0.09 (0.05–0.15) 0.867 (0.398–1.885) 0.718
 LLIN 444 0.26 (0.19–0.37) 2.601 (1.374–4.918) 0.003
  1. IRS indoor residual spray, LLIN long-lasting insecticidal nets, LTC light trap catches