Modified mosquito landing boxes dispensing transfluthrin provide effective protection against Anopheles arabiensis mosquitoes under simulated outdoor conditions in a semi-field system

Table 1 Effect of 90 mg transfluthrin and sources of experimental bias during the evaluation

	Median IQR mosquito landings/night	OR [95% CI]	z value	p value
Treatment
Control	37 [28–40]	1	–	–
Treatment	10 [7.5–12.5]	0.17 [0.09–0.29]	−6.20	<0.001
Person
V1	13 [25–36]	1	–	–
V2	12 [8–28.5]	1.04 [0.61–1.79]	0.16	0.873
V3	18.5 [11–28]	0.83 [0.49–1.42]	−0.67	0.504
V4	25.5 [10–38.5]	1.22 [0.71–2.09]	0.72	0.471
Treatment#person
Treat–V1	13 [9–16.5]	1	–	–
Treat–V2	8 [6.5–10.5]	0.49 [0.21–1.13]	−1.66	0.096
Treat–V3	11 [10–12]	0.88 [0.39–1.98]	−0.30	0.763
Treat–V4	10 [7–12]	0.74 [0.33–1.66]	−0.73	0.467
Compartment
C1	20.5 [11–37]	1	–	–
C2	15.5 [10–32.5]	1.04 [0.60–1.78]	0.13	0.894
Treatment#compartment
Treat–C1	11 [7.5–12.5]	1	–	–
Treat–C2	10 [7.5–12.5]	1.00 [0.45–2.22]	0.01	0.994
Person#compartment
V1–C2	25 [13–37.5]	1	–	–
V2–C2	11.5 [9–17]	0.30 [0.14–0.64]	−3.11	0.002
V3–C2	18.5 [11–27.5]	0.56 [0.26–1.21]	−1.47	0.141
V4–C2	23.5 [7–38.5]	1.11 [0.52–2.40]	0.27	0.784
Treatment#person#compartment
Treat–V1–C2	13 [9–18]	1	–	–
Treat–V2–C2	9.5 [8–11.5]	4.49 [1.40–14.38]	2.53	0.011
Treat–V3–C2	11 [10–13.5]	2.08 [0.91–4.75]	1.73	0.083
Treat–V4–C2	7 [6.5–8.5]	0.49 [0.15–1.55]	−1.22	0.223

Statistical parameters estimated by fitting a mixed effect logistic regression model to the data.
Significant p values (p < 0.05) are in italics.

ISSN: 1475-2875