Zero-truncated negative binomial models with IPTW were used to compare utilization among rural and urban children with at least one encounter for PT/OT, psychiatry/psychology, or other outpatient service.
The zero-truncated Poisson model used to examine rural-urban differences in speech therapy encounters (chosen due to lack of convergence with zero-truncated negative binomial model) does not account for overdispersion, and results should be interpreted with caution.
Second, we expanded the unadjusted zero-truncated negative binomial models to include multiple environmental factors that might influence inhaler use simultaneously, including air pollution, pollen, and meteorological data (Equation 3):
We also conducted a third sensitivity analysis, which implemented the zero-truncated negative binomial regression models using only the inhaler use data that had geolocation information.
In the multivariate zero-truncated negative binomial
model, the presence of guinea pigs was associated with a 2.4-fold increase in estimated triatomine density, and wire mesh enclosures were estimated to harbor only 9% as many triatomines as enclosures of any other material.