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

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

IRS indoor residual spray, LLIN long-lasting insecticidal nets, HLC human landing catches