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Table 6 Outdoor 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 7.37 (4.56–11.90)   
 IRS 76 1.89 (1.09–3.30) 0.257 (0.123–0.536) < 0.001
 LLIN 76 4.16 (2.52–6.86) 0.564 (0.282–1.128) 0.106
 IRS + LLIN 76 1.68 (0.95–2.97) 0.228 (0.108–0.480) < 0.001
b) IRS + LLIN is the reference group
 IRS + LLIN 57 1.68 (0.95–2.97)   
 IRS 57 1.89 (1.09–3.30) 1.125 (0.508–2.489) 0.771
 LLIN 57 4.16 (2.52–6.86) 2.469 (1.158–5.265) 0.019
  1. IRS indoor residual spray, LLIN long-lasting insecticidal nets, HLC human landing catches