Risk factors for human infection with West Nile Virus in Connecticut: a multi-year analysis

Table 4 Model 2: Human WNV infection risk in Connecticut from 2000-2005 using animal-sentinel variables only.

	Unadjusted logistic regression				Adjusted logistic regression
	OR	95% CI		p-value	OR	95% CI		p-value
Mosquito abundance last 120 days (mosquitoes/trap day)
Cs. melanura > = 75% percentile	0.17	0.04	0.72	0.0156
Cs. melanura not reported	0.08	0.04	0.16	<0.0001
Cx. pipiens > = 75% percentile	6.25	3.14	12.45	<0.0001	3.00	1.47	6.13	0.003
Cx, pipiens not reported	0.22	0.09	0.54	0.0009
Cx. restuans > = 75% percentile	2.55	1.34	4.87	0.0045
Cx. restuans not reported	0.13	0.06	0.30	<0.0001
Cx. salinarius > = 75% percentile	2.29	1.19	4.38	0.0127
Cx. salinarius not reported	0.13	0.06	0.28	<0.0001
Ae. vexans > = 75% percentile	4.43	2.30	8.55	<0.0001
Ae. vexans not reported	0.18	0.07	0.41	<0.0001
Animal surveillance data in town last 30 days
All mosquitoes negative for WNV last 30 days (reference)	1.00				1.00
Positive mosquitoes last 30 days	14.38	7.89	26.22	<0.0001	6.78	3.42	13.47	<0.0001
No mosquitoes recorded last 30 days	0.16	0.07	0.36	<0.0001
Dead bird in past 30 days (reference: no birds reported)	7.43	2.88	19.15	<0.0001	2.80	1.19	6.56	0.02
WNV positive bird last 30 days (ref. no WNV positive birds)	13.18	7.75	22.41	<0.0001	3.94	1.96	7.90	0.0001

ISSN: 1476-072X