Table 4.

Estimates of a negative binomial regression for comparison of vector density between pit shelter and other trapping methods in western Kenya

Species and place of collection	Trapping method	Ahero		Iguhu
		Exponentiated estimate (OR)	P-value	Exponentiated estimate (OR)	P-value
An. gambiae (s.l.)
Outdoors	Pit shelter	1.0a		1.0a
	Sticky pot	0.25 (0.20–0.33)	< 0.001	0.22 (0.10–0.47)	< 0.001
	Clay pot	0.16 (0.12–0.20)	< 0.001	0.17 (0.07–0.39)	< 0.001
	Light trap	0.34 (0.26–0.44)	< 0.001	1.40 (0.86–2.27)	0.173
	Exit trap	0.10 (0.07–0.13)	< 0.001	3.65 (2.37–5.61)	< 0.001
Indoors	Prokopack	0.31 (0.24–0.41)	< 0.001	1.37 (0.85–2.21)	0.199
	Light trap	0.34 (0.26–0.44)	< 0.001	2.76 (1.77–4.30)	< 0.001
An. funestus group
Outdoors	Pit shelter	1.0a		1.0a
	Sticky pot	0.20 (0.122–0.33)	< 0.001	0.75 (0.17–3.35)	0.716
	Clay pot	0.12 (0.07–0.21)	< 0.001	0.50 (0.09–2.80)	0.433
	Light trap	2.25 (1.58–3.21)	< 0.001	3.27 (1.04–10.33)	0.044
	Exit trap	2.36 (1.68–3.32)	< 0.001	4.37 (1.43–13.40)	0.010
Indoors	Prokopack	0.94 (0.64–1.36)	0.726	10.37 (3.60–29.88)	< 0.001
	Light trap	5.83 (4.14–8.20)	< 0.001	12.33 (4.3–35.30)	< 0.001

^aReference value

Abbreviation: OR-odds ratio