Country specific classification tree models compared to the generic tree model.

Note: Country Specific Model refers to the classification trees presented in Figure 2; Generic Model refers to the overarching model presented in Figure 1; Accuracy indicates the proportion of correctly classified cases, with associated confidence interval; Difference in accuracy between Country Specific Model and Generic Model was tested using a 2-sided Chi-Square test; Sensitivity = [number of correctly classified CAST ≥7]/[number of CAST ≥7 in sample]; Specificity = [number of correctly classified CAST Country specific classification tree models compared to the generic tree model.