5. Vector density: ITNs versus no intervention.

Trial ID	Unit of randomization	Intervention	Main vector	Measure (method)	Pre‐intervention		Post‐intervention		Effect measure (95% CI) or P value
					ITNs	Control	ITNs	Control
Chowdhury 2011 BGD	Cluster of 50 houses	PermaNet® 2.0 (deltamethrin 55mg/m²) distributed to all households in November 2006.	P. argentipes	Total sandflies (monthly collections from 40 houses using light traps).	724 (October 2006)	683 (October 2006)	18 (January 2007) 361 (March 2007)	54 (January 2007) 1219 (March 2007)	RR 0.73 (0.23 to 2.25) (Jan 2007) RR 0.31 (0.21 to 0.46) (Mar 2007) The benefit with ITNs was still present at 12 months
Emami 2009 IRN	City sector (approx. 3000 houses)	Olyset® (permethrin 2%) distributed to all households in August 2004.	P. sergenti	Total sandflies (monthly collections during transmission season using light traps and sticky traps).	Not reported	Not reported	Not reported	Not reported	The authors state: 'There were statistically significant differences in the monthly catches of P. sergenti between control and intervention sectors in both cities (P < 0.05)'.
Joshi 2009 ASIA	Hamlets or neighnourhoods	PermaNet® (deltamethrin 55mg/m²) distributed to all households (date not stated).	P. argentipes	Mean number of sandflies per per house (light traps) per night at all sites pooled in Nepal, Bangladesh and India.	9.92 (date not stated)	9.41 (date not stated)	8.32 (5 months post intervention)	12.15 (5 months post intervention)	Pre‐intervention P = 0.798 Post‐intervention P = 0.16 (The trial authors state the effect was significant in India and Bangladesh but not Nepal)

Abbreviations: IRN = Iran; BGD = Bangladesh; ITNs = insecticide treated nets; RR = risk ratio).