Table 3 Generalized linear mixed model (logit link function) of human seropositivity for Trypanosoma cruzi infection for the total population (Model 1, n = 1189) and for children aged ≤ 18 years born before control interventions (Model 2, n = 492) from Areas II and IV, Pampa del Indio, Chaco. RI relative importance, OR Adjusted odds ratio; 95% CI 95% confidence interval
Variable | Model 1 | Model 2 | ||||
|---|---|---|---|---|---|---|
RI | OR (95% CI) | P | RI | OR (95% CI) | P | |
Duration of exposure (years) | 1 | 1.04 (1.04–1.05) | < 0.001 | 1 | 1.25 (1.15–1.37) | < 0.001 |
Number of seropositive co-inhabitants | 1 | – | – | |||
0 | 1 | – | – | – | ||
1–2 | 1.20 (0.87–1.67) | 0.26 | – | – | – | |
3 or more | 5.30 (3.44–8.17) | < 0.001 | – | – | – | |
Maternal seropositivity | – | – | – | 0.94 | ||
No | - | – | – | 1 | ||
Yes | – | – | – | 3.38 (1.37–8.34) | 0.008 | |
Time of residence (years) | 1 | 0.8 | ||||
< 3 | 1 | 1 | ||||
3–10 | 0.43 (0.24–0.75) | 0.003 | 0.13 (0.03–0.62) | 0.01 | ||
> 10 | 0.48 (0.27–0.85) | 0.01 | 0.16 (0.03–0.71) | 0.02 | ||
Inhabiting a house with suitable walls for triatomines | 1 | 0.6 | ||||
No | 1 | 1 | ||||
Yes | 1.47 (1.07–2.01) | 0.02 | 2.29 (0.86–6.07) | 0.1 | ||
Self-reported inhabiting an infested house | 0.48 | 0.45 | ||||
No | 1 | 1 | ||||
Yes | 1.29 (0.92–1.82) | 0.15 | 1.79 (0.73–4.37) | 0.2 | ||
Ethnicity | 0.43 | 0.38 | ||||
Creole | 1 | |||||
Qom | 1.49 (0.90–2.47) | 0.13 | 1.67 (0.37–7.57) | 0.5 | ||
Operational area | 0.70 | 0.39 | ||||
II | 1 | 1 | ||||
IV | 1.63 (0.84–3.15) | 0.15 | 1.38 (0.18–10.6) | 0.8 | ||
Ethnicity × Area | 0.35 | 0.14 | ||||
Creole × Area II | 1 | 1 | ||||
Qom × Area IV | 0.50 (0.25–1.00) | 0.05 | 0.12 (0.01–1.16) | 0.07 | ||