Table 2. Association between mosquito counts and factors assumed to influence indoor mosquito density as measured in incidence rate ratios (IRR) from univariable negative binomial regression models.

				Anopheles gambiae s.l.			Anopheles funestus s.s.			All mosquitoes
Factor	Type of variable	N	Reference	IRR	95% CI	p	IRR	95% CI	p	IRR	95% CI	p
Plant Used	Factor	321	No plants	1		0.002	1		<0.0001	1		<0.0001
			Lantana	0.48	0.30–0.76		0.17	0.09–0.30		0.54	0.40–0.73
People in H/Hold	Continuous	321	per 1 person	1.03	0.94–1.13	N.S.	1.02	0.91–1.16	N.S.	1.007	0.94–1.08	N.S.
No slept under nets last night	Continuous	321	per 1 net	0.93	0.83–1.04	N.S.	1.22	1.03–1.44	0.02	1.02	0.94–1.12	N.S.
Bednets owned	Continuous	321	per 1 net	0.59	0.38–0.93	0.02	1.87	0.98–3.58	N.S.	0.91	0.67–1.22	N.S.
Roof material	Factor	316	Tin	1		N.S.	1		N.S.	1		N.S.
			Thatch	0.95	0.60–1.52		0.83	0.43–1.59		0.99	0.74–1.34
Eaves	Factor	321	Closed	1		N.S.	1		N.S.	1		N.S.
			Open	1.36	0.84–2.20		1.35	0.65–2.81		1.28	0.93–1.78
Place of cooking	Factor	321	Indoors	1		N.S.	1		N.S.	1		N.S.
			Outdoors	1.27	0.73–2.21		0.74	0.38–1.43		1.17	0.82–1.67
Burn a fire overnight	Factor	318	No fire	1		N.S.	1		N.S.	1		N.S.
			Fire	1.52	0.50–4.63		1.04	0.42–2.56		1.06	0.60–1.89
VisibleSmoke Stains	Factor	321	None	1			1			1
			Some	0.78	0.43–1.41	N.S.	0.85	0.36–2.04	N.S.	0.89	0.60–1.31	N.S.
			Extensive	0.79	0.46–1.33	N.S.	0.80	0.38–1.70	N.S.	0.73	0.53–0.99	0.05
Livestock overnight in house	Factor	321	None	1			1			1
			Indoors	1.80	1.05–3.09	0.03	1.10	0.47–2.57	N.S.	1.26	0.89–1.78	N.S.
			Outdoors	1.05	0.58–1.91	N.S.	0.60	0.23–1.53	N.S.	1.02	0.71–1.48	N.S.
Sampling period	Factor	321	Sept–Dec '08	1			1			1
			Jan–April '09	0.39	0.24–0.64	<0.0001	2.99	1.00–8.93	0.049	1.08	0.78–1.49	N.S.
			May–July '09	0.27	0.14–0.53	<0.0001	7.04	2.29–21.69	0.001	1.28	0.82–2.01	N.S.