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Table 5 Indoor human biting rates using human landing catches 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

Study arms Person-night catch Mean biting density (95% CI) IRR (95% CI) p-value
a) Control is the reference group
 Control 76 9.89 (6.17–15.86)   
 IRS 76 1.68 (0.95–2.97) 0.170 (0.081–0.356) < 0.001
 LLIN 76 3.95 (2.39–6.53) 0.399 (0.200–0.795) 0.009
 IRS + LLIN 76 1.63 (0.92–2.89) 0.165 (0.078–0.346) < 0.001
b) IRS + LLIN is the reference group
 IRS + LLIN 57 1.63 (0.92–2.89)   
 IRS 57 1.68 (0.95–2.97) 1.032 (0.461–2.309) 0.938
 LLIN 57 3.95 (2.39–6.53) 2.420 (1.129–5.181) 0.023
  1. IRS indoor residual spray, LLIN long-lasting insecticidal nets, HLC human landing catches