Table 3.

Deltamethrin residual concentrations in eave net samples or door lamellae after 12 and 24 months of use.

Material	No tested	Months in use	Mean deltamethrin (g/kg)	RR (95% CL)	P-value
Eave north	42	12	0.33(0.25-0.41)	1.16(0.55-2.45)	P=0.70
Eave east	42	12	0.32(0.26-0.38)	Ref
Eave north	10	24	0.11(0.02-0.20)	0.04(.05-.19)	<0.0001
Eave east	10	24	0.25(0.34-0.46)	0.05(.11-.45)	<0.0001
DC* north	9	24	0.04(0.007-0.07)	0.04(.02-.07)	<0.0001
DC west	5	24	0.06(0.01-0.12)	0.05(.05-.06)	<0.0001
DC south	11	24	0.07(0.03-0.11)	0.07(.03-.15)	<0.0001
Door lamellae	5	24	0.08(0.07-0.23)	0.07(.02-.24)	<0.0001
Bednet	16	24	1.11(1.06-1.16)	1	Ref

* DC = Door curtains.