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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