Dwelling infestation by triatomine bugs in 39 municipalities, Cochabamba, Bolivia, 2000–2011^*: linear mixed model results, with intervention effort modeled as the amount of insecticide used per census inhabitant in the previous year (number of parameters <i>k</i> = 7; BIC = 881.63; AICc

*No infestation surveys were conducted in 2002. The model used N = 325 observations (year-specific municipality-level dwelling infestation rates), weighted by a measure of bug-search effort; the inclusion of one-year lagged covariates censored observations for year 2000 (see text for details). BIC, Bayesian information criterion; AICc, second-order Akaike's information criterion. All fixed-effect coefficient estimates were different from zero at the 5% level; SE, standard error; CI95, lower and upper limits of the 95% confidence interval. REML, restricted maximum likelihood; σ2, random effect variance estimate; %σ2, percentage of total variance that is attributable to differences in average infestation among municipalities (‘Municipality’), also known as intra-class correlation, and to year-to-year variation in infestation rates within municipalities (‘Residual’). Ratio = Municipality/Residual variance estimates.