Table 3.

Unadjusted and adjusted odds ratios for evidence of previous RVFV infection by a positive plaque reduction neutralization test (minimum titer ≥ 1:40)

Risk factor	No.	Rift Valley fever virus IgG positive
		Unadjusted OR (95% CI)	Adjusted OR (95% CI)
History of contact with cattle			3.2 (1.0, 9.9)
Yes	132	3.5 (1. 2, 10.4)	Ref.
No	217	Ref.
History of chronic medical problems
Yes	27	7.0 (2.2, 22.1)	6.4 (1.8, 23.4)
No	316	Ref.	Ref.
Sheltered livestock in home
Yes	186	4.0 (1.1, 14.3)
No	163	Ref.
Cared for birthing animal
Yes	87	4.2 (1.5, 11.6)
No	261	Ref.
Disposed of and aborted animal fetus
Yes	72	3.2 (1.2, 9.0)
No	278	Ref.
Cared for a sick animal
Yes	88	4.2 (1.5, 11.5)
No	262	Ref.
Handled an animal carcass
Yes	73	3.1 (1.1, 8.7)
No	275	Ref.
History of poor vision
Yes	20	4.3 (1.1, 16.5)
No	329	Ref.	–

RVFV = Rift Valley fever virus; OR = odds ratio; CI = confidence interval.