Table 2.

Univariate analyses of hosts, clustering and ecological associations with Chagas Sero K-SeT (Pampa del Indio)

	Category	n	No. positive (%)	OR (95% CI)	P-value
Humans	Age	292	199 (68.2)	1.00 (0.98–1.01)	0.62
	Ethnicity
	Creole	68	50 (73.5)	1
	Qom	224	149 (66.5)	0.72 (0.38–1.29)	0.28
	Gender
	Female	144	100 (69.4)	1
	Male	148	99 (66.9)	0.89 (0.54–1.46)	0.64
	Study area
	II	212	136 (64.2)	1
	IV	80	63 (78.8)	2.07 (1.15–3.88)	0.02*
	Presence of T. infestans in the household
	No	59	43 (72.9)	1
	Yes	233	156 (67)	0.75 (0.39–1.40)	0.38
	Cohabitant with reactive RDT
	No	146	102 (69.9)	1
	Yes	146	97 (66.4)	0.85 (0.52–1.40)	0.53
Dogs	Function
	Guardian	41	26 (63.4)	1
	Hunting	32	23 (71.9)	1.47 (0.49–4.59)	0.47
	Type of hunting
	Sylvatic animals	34	23 (67.6)	1
	Not hunting	16	11 (68.8)	1.05 (0.25–4.84)	1.00
	Place of birth
	In study area	52	36 (69.2)	1
	Not in study area	12	9 (75)	1.33 (0.28–8.63)	1.00
	Ethnicity of the household
	Creole	57	31 (54.4)	1
	Qom	22	20 (90.1)	8.39 (1.73–78.92)	0.00*
	Born after mass spraying
	Yes	5	1 (20)	1
	No	73	50 (68.5)	8.70 (0.78–436.49)	0.05*
	Place of sleeping
	Outside of the domicile	18	12 (66.7)	1
	Inside of the domicile	14	12 (85.7)	3.00 (0.41–35.07)	0.41

Note: Areas II and IV only. In each case, only those samples where the examined information was known were included in the analysis

* Statistical significance (P ≤ 0.05)

Abbreviations: OR, odds ratio; CI, confidence interval