Table 5. Risk factors for seroreactivity to Trypanosoma cruzi infection in dogs, Pampa del Indio, Chaco.

Factor	OR	95% CI	% seropositive (n)
Inhabiting high-risk houses
No	1	-	1.23 (325)
Yes	5.66	1.77–18.06	6.59 (167)
Born before interventions&
No	1	-	2.28 (438)
Yes	5.94	1.93–18.33	12.20 (41)
Dog origin&
Urban immigrant	1	-	2.88 (104)
Rural immigrant	0.7	0.03–5.64	2.04 (49)
Native	1.18	0.36–5.27	3.37 (326)

^& Excludes 13 dogs with no data for this factor.