Table 3. Post-control surveillance of domestic infestation by Triatoma infestans and T. sordida with chemically-baited traps: bait effects estimated with hierarchical logistic models.
| Assessment | Model structure | AIC | N | k | Effect on p | Effect on ψ | ||
| β bait(SE) | βHexanal(SE) | βNonanal(SE) | βParaguay(SE) | |||||
| 3-month | ψ(.), p(bait) | 515.4 | 488 | 3 | 1.63(0.35) | - | - | - |
| ψ(Paraguay), p(bait) | 516.8 | 488 | 4 | 1.63(0.35) | - | - | 0.25(0.31) | |
| 6-month | ψ(.), p(Hexanal,Nonanal) | 356.6 | 484 | 4 | - | 1.78(0.42) | 1.39(0.66) | - |
| ψ(.), p(bait) | 369.7 | 484 | 3 | 0.79(0.38) | - | - | - | |
| 6-month* | ψ(.), p(bait) | 320.2 | 274 | 3 | 0.79(0.38) | - | - | - |
| ψ(.), p(Hexanal) | 320.4 | 274 | 2 | - | 0.81(0.39) | - | - | |
| ψ(.), p(Hexanal,Nonanal) | 321.8 | 274 | 4 | - | 0.88(0.41) | 0.46(0.63) | - | |
Model structure: ψ, vector occurrence probabilities; p, vector detection probabilities, conditioned on occurrence (in parentheses, covariate names, with “.” denoting no covariate in that part of the model). AIC, Akaike information criterion; N, number of sampling units; k, number of parameters; β, estimated slope parameter; SE, standard error.
*
Paraguay data only.