Risk factors for house-entry by malaria vectors in a rural town and satellite villages in The Gambia

Malaria Journal

Table 2 Association between mosquito counts and potential risk factors as measured in incidence rate ratios (IRR) from negative binomial regression models.

		Univariate		Multivariate with sentinel* (N = 950)		Multivariate without sentinel* (N = 949)
		IRR (95%CI)	P-value	IRR (95%CI)	P-value	IRR (95%CI)	P-value
Sentinel		1.02(1.013,1.025)	<0.0001	1.013(1.009,1.018)	<0.0001
Month of mosquito collection
	August	1	<0.0001
	September	2.24(1.74,2.88)
	October	0.67(0.52,0.87)
Location
	Rural	1		1		1
	Urban	0.11(0.09,0.13)	<0.0001	0.11(0.09,0.13)	<0.0001	0.11(0.09,0.13)	<0.0001
Distance (m) to nearest pit latrine		1.006(1.003,1.01)	<0.0001
Cows in compound		1.17(1.04,1.33)	0.012
Horses in compound		0.92(0.85,0.99)	0.038	0.78(0.74,0.83)	<0.0001	0.77(0.73,0.82)	<0.0001
Wall type
	Cement	1				1
	Mud Brick	5.36(3.92,7.31)	<0.0001			1.44(1.10,1.87)	0.007
Roof type
	Metal	1
	Thatch	1.15(0.94,1.41)	0.163
Eaves
	Open	1		1		1
	Closed	0.38(0.32,0.46)	<0.0001	0.73(0.62,0.86)	<0.0001	0.71(0.60,0.85)	<0.0001
Eave gap size (cm)		1.06(1.04,1.08)	<0.0001
House volume (m ³ )		0.997(0.996,0.998)	<0.0001	.9988(.9978,.9997)	0.013
People in house		1.03(0.99,1.06)	0.059	1.06(1.03,1.09)	<0.0001	1.04(1.02,1.06)	0.001
Children in house		1.05(0.99,1.12)	0.073
Trapping room volume (m ³ )		1.02(1.01,1.03)	<0.0001
People in trapping room		1.25(1.18,1.33)	<0.0001	1.17(1.11,1.24)	<0.0001	1.19(1.13,1.25)	<0.0001
Children in trapping room		1.16(1.05,1.28)	0.003
Sleepers in trapping bed		1.19(1.06,1.34)	0.004
Coil in room
	No	1
	Yes	0.47(0.35,0.62)	<0.0001
Insecticide spray in room
	No	1	<0.0001
	Yes	0.14(0.05,0.37)
Churai in room
	No	1		1		1
	Yes	0.50(0.40,0.62)	<0.0001	0.56(0.48,0.67)	<0.0001	0.56(0.47,0.66)	<0.0001
Insecticide treated nets in room
	No	1	0.134
	Yes	0.82(0.63,1.06)

*Sentinel data has been incorporated in the model as the average mosquito count of the four houses

ISSN: 1475-2875