Model parameters of the five spatially explicit models.

CI, credible interval; DIC, deviance information criterion (a measure of model fit; a lower DIC indicates a better fit).Model 1: Bayesian geostatistical model with no covariates; Model 2: Bayesian geostatistical model with environmental covariates only; Model 3: Bayesian geostatistical model with questionnaire derived covariates only; Model 4: Bayesian geostatistical model with environmental and questionnaire-derived covariates, without treatment; Model 5: Bayesian geostatistical model with environmental and questionnaire-derived covariates, including treatment.σ is the location-specific unexplained variance.ρ is the decay parameter. The range (range = 3/ρ) is the distance at which the spatial correlation becomes less than 5%.