Table 3. Vector abundance, human biting rate and entomological inoculation rate at baseline and during intervention in non-LCI and LCI sites, Kenya, 2004–2007.

	Baseline			Intervention		Per cent reductiona
	Non-LCI sites	LCI sites		Non-LCI sites	LCI sites
Anopheles late instar larval abundance
Mean number of mosquito larvae per dip	0.19	0.26		0.21	0.02*	91.1
95% CI	0.14–0.26	0.18–0.36		0.15–0.28	0.01–0.05	87.1–94.8
Anophelesb adult abundance
Mean number of adult mosquitos per house	3.69	3.49		0.6	0.08*	85.9
95% CI	2.25–6.06	2.49–4.88		0.45–0.79	0.06–0.13	79.6–88.0
Average human biting rate
Mean number of bloodfed Anopheles females per person per sampling date	0.45	0.39		0.06	0.014*	73.1
95% CI	0.28–0.73	0.27–0.56		0.04–0.09	0.006–0.028	59.4–84.4
Annual entomological inoculation rate
Mean number of infectious bites per person per year	11.98	10.3		1.68	0.39*	73.1
95% CI	7.39–19.4	7.2–14.95		1.16–2.42	0.19–0.79	59.4–84.4

*Difference between LCI and non-LCI sites in same time period significant at P < 0.001.
CI, confidence interval; LCI, larval control intervention.
^a Percent reduction = 100 − (non-LCI at baseline / LCI at baseline × LCI during intervention / non-LCI during intervention) × 100.
^b Anopheles gambiae and Anopheles funestus combined.